County of Isenburg

The County of Isenburg was a region of Germany located in southern present-day Hesse, located in territories north and south of Frankfurt. The states of Isenburg emerged from the Niederlahngau (located in the Rhineland-Palatinate), which partitioned in 1137 into Isenburg-Isenburg and Isenburg-Limburg-Covern. These countships were partitioned between themselves many times over the next 700 years.

Isenburg (pink, right) and Lower Isenburg (pink, left) around 1400

House of Isenburg
Ruins of the Castle at Isenburg (Lower Isenburg)

The House of Isenburg was an old aristocratic family of medieval Germany, named after the castle of Isenburg in Rhineland-Palatinate. Occasionally referred to as the House of Rommersdorf before the 12th century, the house originated in the Hessian comitatus of the Niederlahngau in the 10th century. It partitioned into the lines of Isenburg-Isenburg and Isenburg-Limburg-Covern in 1137, before partitioning again into smaller units, but by 1500 only the lines of Isenburg-Büdingen (in Upper Isenburg) and Lower Isenburg remained. In 1664 the Lower Isenburg branch died out. The Büdingen line continued to partition, and by the beginning of the 19th century the lines of Isenburg-Büdingen, Isenburg-Birstein, Isenburg-Meerholz and Isenburg-Wächtersbach existed. Today still exist the (Roman Catholic) princes of Isenburg (at Birstein), the (Lutheran) princes of Ysenburg (at Büdingen and Ronneburg) and the (Lutheran) counts of Ysenburg-Philippseich.

"Family tree" of the Isenburg countships
Büdingen Castle
Castle Ronneburg, Hesse
Birstein Castle
Wächtersbach Castle
Meerholz Castle at Gelnhausen
Philippseich Castle at Dreieich

Isenburg, the original countship was divided upon the death of Count Rembold II in 1137 into:

Principality of Isenburg
Coat of Arms of the Principality of Isenburg

It was not until 1806 that there was a state called simply "Isenburg". When the Holy Roman Empire was defeated by Napoleon I of France in that year, the empire was abolished and the Confederation of the Rhine was established amongst the various German states. As an incentive to join the Confederation, it was stated that any state which joined could mediatise their neighbours. Prince Charles of Isenburg-Birstein joined the Confederation and was granted the mediatized Isenburgian Countships of Isenburg-Büdingen, Isenburg-Meerholz, Isenburg-Philippseich, and Isenburg-Wächtersbach. His Principality was renamed to Isenburg.

The Principality continued under the rule of Prince Charles through the Napoleonic era, but was mediatised by Austria in December 1813, at the insistence of King Frederick William III of Prussia, who was angered that Isenburg had raised a regiment for French service by recruiting Prussian deserters and vagabonds.[1] Isenburg was one of only three original member princes of the Empire to be mediatized at the end of the Napoleonic era (the others being Leyen and prince-primate Dalberg, Prince of Aschaffenburg). This decision was confirmed at the Congress of Vienna. The lands of the principality were divided between the Grand Duchy of Hesse-Darmstadt and the Electorate of Hesse-Kassel (or Hesse-Cassel).

Rulers

Partitions of Isenburg under House of Isenburg rule
County of Isenburg
(1041-1199)
      
County of
Kempenich
(1st creation)
(1137-1153)		 County of Covern
(1137-1270)
      
             
County of Cleeberg
(1167-1340)
County of
Braunsberg
(1199-1388)
Renamed as:
County of
Wied
(1388-1462)
County of
Kempenich
(2nd creation)
(1199-1424)		       
      
County of
Lower Isenburg
(1218-1502)		       
             
County of
Limburg
(1227-1406)
Inherited by the
House of Vianden
(1270-1306)		       
       County of
Grenzau
(1st creation)
(1278-1292)		 County of
Arnfels
(1278-1371)
      
      
County of
Grenzau
(2nd creation)
(1340-1439)
County of Büdingen
(1st creation)
(1340-1511)
Part of the
County of
Braunsberg
(1371-1388)
Renamed as:
County of
Wied
(1388-1462)
To
Archbishopric
of Trier
To Lords of
Schöneck
(1424-1434),
Archbishopric
of Trier
(1434)
and Counts of
Virneburg
(from 1434)
To Nassau-Beilstein
(1439-1446)
and Archbishopric
of Trier
(1446-1460)
      
To County of Wied To County of Wied
County of
Neumagen
(1502-1554)
County of
Grenzau
(3rd creation)
(1502-1664)
County of Ronneburg
(1511-1601)		 County of Birstein
(1st creation)
(1511-1664)
To County of Sayn-Homburg
      
County of Büdingen
(2nd creation)
(1628-1806)
(mediatized to Isenburg-Birstein in 1806)		              
To Archbishopric of Trier, Archbishopric of Cologne and Abbots of Fulda County of Offenbach
(1628-1718)
       County of Marienborn
(1673-1725)		       
County of Meerholz
(1673-1806)
(mediatized to Isenburg-Birstein in 1806)		              
County of Wachtersbach
(1673-1806)
(mediatized to Isenburg-Birstein in 1806)		               County of Philippseich
(1711-1806)
(mediatized to Isenburg-Birstein in 1806)
County of Birstein
(2nd creation)
(1685-1744)
Raised to
Principality of Birstein
(1744-1806)
Principality of Isenburg
(Isenburg-Birstein line)
(1806-1815)
(mediatized to Hesse in 1815)

Table of rulers
RulerBornReignDeathRuling partConsortNotes
Gerlach Ic.1060 1090-1110c.1110[2]County of IsenburgUnknown
at least two children		 Brothers and founders of the family and the county.
Rembold Ic.1060c.1110[2]County of IsenburgUnmarried
Rembold IIc.10901115-11371137County of IsenburgKatharina of Arnstein
five children		 Sons of Gerlach I. Brothers and co-rulers.
Gerlach IIc.10901115-1120c.1120[3]County of IsenburgUnmarried
Gerlach III?1137-11581158Isenburg-CovernJutta of Are
three children		 Sons of Rembold II. In 1137, they divided the land between the three. Siegfried didn't have documented children, so his land may have returned to Isenburg. After the childless death of Rembold III, his nephew Rembold IV kept Isenburg-Isenburg.
Rembold III?1137-11621162County of Isenburg
Isenburg-Isenburg		Unmarried
Siegfried?1137-11531153Isenburg-KempenichJustina of Kempenich
no children
Rembold IV ? 1153-1175 c.1175 Isenburg-Kempenich Unknown
two children		 Son of Gerlach III. As a second son, he received the property of his childless uncles.
1162-1175Isenburg-Isenburg
Gerlach IV1130/491158-12171217Isenburg-CovernUnknown of Covern
three children

Unknown of Leiningen
two children		 Children of Gerlach I, divided the land between them. Possibly there might be two Gerlachs here instead of one, the first ruling until 1167, and the other from 1167, but it's also possible they were one and the same.
Henry Ic.11501167-12271227Isenburg-CleebergIrmgard of Büdingen
(d.c.1220)
eight children
Rembold V ? 1175-1199 c.1220 Isenburg-Isenburg Hedwig of Kampenich
two children		 Sons of Rembold IV, inherited Isenburg-Isenburg, and divided it between them.
1199-1220Isenburg-Kempenich
Bruno I ? 1175-1199 1210[4] Isenburg-Isenburg Theodora of Wied
(d.1218)
four children
1199-1210Isenburg-Braunsberg
Bruno II11761210-12551255[5]Isenburg-BraunsbergJohanna
two children
Gerlach V? 1217-123515 April 1235Isenburg-CovernJutta
(d. July 1253)
two children		 Sons of Gerlach IV, ruled jointly.
Henry I?15 April 1235Isenburg-CovernUnmarried
Salentin I?1218-c.1219c.1219Lower IsenburgUnknown
at least one child		Portion probably granted by Rombald V to his eldest son, Salentin. He died in Crusade next year.
Theodoric I ? c.1220-1250 c.1250 Lower Isenburg Uta of Blankenheim
(d.1252)
one child

Adelaide
(d.1258)two children		 Sons of Rombald V, ruled jointly. It's possible that Theodoric ruled in Lower Isenburg during a possible minority of Salentin's heir.
1220-1251Isenburg-Kempenich
Rosemann?1220-12641264Isenburg-KempenichKunigunda of Büdingen-Gelnhausen
(d.c.1250)
one child
Henry IIc.12001227-127829 September 1278Isenburg-CleebergMatilda of Hochstaden
(d.1264)
1246
eight children		 Sons of Henry I, divided the land between them.
Gerlach IVc.12001227-1289January 1289Isenburg-LimburgImagina of Bliescastel
(1233-1281)
five children
Henry IIc.12101235-1270c.1270Isenburg-CovernMatilda
c.1235
no children		 Children of Gerlach V, ruled jointly. None of them had children, and the county passed to their sister.
Gerlach VIc.12101235-12691269Isenburg-CovernUnmarried
Theodoric II the Younger ?1251-1273 1273[6] Lower Isenburg Uta of Merenberg
(d.1263)
four children		 Son of Salentin I. Like his uncle, he may have been also involved in the government of both Lower Isenburg and Isenburg-Kempenich.
1264-1273Isenburg-Kempenich
Bruno III?1255-127829 September 1278[7]Isenburg-BraunsbergSophia of Runkel
(d. 26 March 1266)
one child

Isolda of Heinsberg
(d.c.1290)
c.1270
two children
Gerard I?1264/73-12871287Isenburg-KempenichBeatrice
(d.c.1275)
four children
Cecilia[8]c.12101269-1275c. of after 1275Isenburg-CovernFrederick of Vianden
(c.1200-c.1272?)
1225?
at least one child		Sister of Henry II and Gerlach VI, held the county after them. Through her the county passed to the Vianden family,[8] and remained this way until 1306, when it was returned to Isenburg-Cleeberg. From the House of Vianden, the counts in Covern (possibly some of them co-ruling with Cecilia) were:
Covern absorbed within the House of Vianden patrimony (c.1275-1306), and then reabsorbed in Cleberg
Salentin II?1275-12971297Lower IsenburgAgnes of Runkel
(d.1316)
ten children
Regency of Isolda of Loon-Heinsberg (c.1278-1284)
John Ic.12701278-13271327Isenburg-BraunsbergAgnes of Lower Isenburg
(d.1316)
1294
seven children
Louisc.12501278-13041304Isenburg-CleebergHeilwig of Tübingen
(d.c.1295)
seven children		 Sons of Henry II, divided the land between them. Eberhard left no heirs and his portion was inherited by his brother Louis.
Gerlach Ic.12501278-1305c.1305Isenburg-ArnfelsElisabeth of Clèves
(1236-1290)
five children
Eberhardc.12501278-129225 November 1292Isenburg-GrenzauIrmgard of Büdingen
(d.c.1220)
eight children
Isenburg-Grenzau annexed to Isenberg-Cleberg
Theodoric III?1287-13251323/25Isenburg-KempenichKunigunde of Solms
(d.1344)
two children		 Sons of Gerard I, ruled jointly.
Simon I?1287-1320c.1320Isenburg-KempenichAgnes of Trier
1293
two children
John I the Blind12661289-131219 September 1312Isenburg-LimburgElisabeth of Geroldseck-Veldenz
(1266-1285)
two children

Uda of Ravensberg
(1268-28 June 1313)
25 August 1292
five children
Salentin III?1297-13511351Lower IsenburgKatharina
one child

Matilda of Covern
(d.1350)
six children
Lothar?1304-13414 February 1341Isenburg-CleebergIsengard of Falkenstein
(d.c.1330)
five children
Theodoric?1305-13341334Isenburg-ArnfelsHedwig of Neuenahr
(d.c.1330)
five children		 Sons of Gerlach I, ruled jointly.
John?1305-134817 November 1348Isenburg-ArnfelsKatharina
no children

Jutta of Arscheid
(d.c.1385)
no children
Gerlach V the Elderc.12951312-135514 April 1355Isenburg-LimburgAgnes of Nassau-Siegen
(d.1318)
1312
three children

Kunigunde of Wertheim
(d.1362)
20 December 1323
eight children
Simon II?1325-13391337/39Isenburg-KempenichKatharina of Sayn
(d.c.1345)
one child		 Simon II and Theodoric IV, as sons of Theodoric III, ruled jointly with their cousin, Gerard II, son of Gerard I.
Theodoric IV the Arsonist?1329-13411341Isenburg-KempenichUnmarried
Gerard II?1329-1335c.1335Isenburg-KempenichUnmarried
William Ic.13101327-138317 July 1383[9]Isenburg-BraunsbergAgnes of Virneburg
(d.1352/3)
1329
(annulled 12 September 1351)
five children

Johanna of Jülich
(d.1362)
27 July 1354
one child

Lisa of Isenberg-Arenfels
(d. 30 November 1403)
11 November 1362
two children		Grandson of John I.
Simon III?1341-1360c.1360Isenburg-KempenichHedwig of Schönberg
(d.1367)
six children
Henry I[10]13201341-13791379Isenburg-BüdingenAdelaide of Hanau
(d.29 July 1378)
29 July 1332
six children		 Sons of Lothar, divided the land between them.
Philip Ic.13201341-137022 March 1370Isenburg-GrenzauMargaret of Katzenelnbogen
(d.9 July 1370)
1338
two children
Gerlach II?1348-137114 August 1371Isenburg-ArnfelsElisabeth of Braunshorn
(d.15 November 1339)
six children

Demut of Roesberg
(d.c.1365)
two children		Son of Theodoric, had no surviving descendants. Arenfels went to Isenburg-Wied.
Isenburg-Arnfels annexed to Isenburg-Braunsberg/Wied
Salentin IVc.13201351-13641364Lower IsenburgKatharina of Solms
(d.2 May 1399)
25 February 1341
two children
Gerlach VI the Youngerc.13251355-1366April 1366Isenburg-LimburgElizabeth of Falkenstein
(d. 9 April 1366)
9 November 1356
no children		Died of Black Death, without male heirs.
Salentin Vc.13451364-142030 November 1420Lower IsenburgAdelaide of Isenburg-Arenfels
(d.1401)
6 May 1371
ten children
John IIc.13251366-140626 January 1406Isenburg-LimburgHildegard of Saarwerden
(d.1419)
two children		Brother of Gerlach VI. Originally went into clergy. However, after his brother's death with no heirs, and with the permission of Pope Urban V, John put aside the office of Canon of Trier Cathedral and took over the rule of Limburg. He left no male heirs. The land went to the Archbishopric of Trier.
Isenburg-Limburg was annexed to the Archbishopric of Trier
Simon IV?1360-14141414Isenburg-KempenichUnmarried Sons of Simon III, ruled jointly. The death of the last one of them with no male descendants led to the annexation of the land to the Lords of Schöneck.
Theodoric V?1360-13781378Isenburg-KempenichUnmarried
John?1360-14241424Isenburg-KempenichGertrude of Hückelhoven
(d.1421)
one child
Henry?1360-13881388Isenburg-KempenichElisabeth of Schönkeen
no children
Kempenich annexed to the Lordship of Schöneck (1424-1434), the Archbishopric of Trier (1434) and then to the County of Virneburg
Eberhard13561370-13991399Isenburg-GrenzauMatilda of the Mark
(d.6 August 1406)
1371
five children
John I13251379-13951395Isenburg-BüdingenSophia of Wertheim
(d.1389)
28 July 1355
two children
William II13521383-c.1409c.1409Isenburg-BraunsbergUnmarried
John II13601395-14081408Isenburg-BüdingenMargaret of Katzenelnbogen
(1365-1438)
1385
two children
Philip II13761399-14401440Isenburg-GrenzauMargaret of Lower Isenburg
(d.15 June 1441)
17 January 1395
no children		His childless death determined that the county was inherited by his sister.
Diether13901408-146120 November 1461Isenburg-BüdingenElisabeth of Solms-Braunfels
(c.1410-17 July 1451)
26 July 1409
eight children
Gerlachc.13651409-14131413Isenburg-BraunsbergAgnes of Isenburg-Büdingen
(d.4/9 July 1402)
27 September 1376[11]
four children		Half-brother of William II.
William IIIc.13801413-146222 October 1462[11]Isenburg-BraunsbergMargaret of Moers
no children

Philippa of Loon-Heinsberg
(d.14 January 1464)
10 April 1402
no children		 Sons of Gerlach, ruled jointly. After William's death, Dietrich IV, Lord of Runkel, could claim the county through the marriage with Anastasia, John II's daughter.
John IIc.13801413-14541454Isenburg-BraunsbergAgnes of Westerburg
(d.1415)
1400
two children

Kunigunde of Westerburg
(d. 2 February 1428)
1415
no children

Kunigunde of Saffenberg
(d.1454)
1428
no children
Wied annexed to Runkel's domains, and then returned to the County of Wied
Salentin VIc.13751420-14581458Lower IsenburgAdelaide of Isenberg-Grenzau
no children

Maria, Countess of Isenberg-Grenzau
ten children		Called sometimes of Grenzau, probably from his marriage.
Mariac.1375c.1440after 1440Lower IsenburgSalentin VI, Count of Lower Isenburg
ten children		Heiress of Grenzau, which through her should be directly inherited by Lower Isenburg. However, she may have kept it less than a year, before being annexed to Nassau-Beilstein, then to the Archbishopric of Trier, and finally sold to the rightful owners, the Counts of Lower Isenburg.
Annexed to the County of Nassau-Beilstein (1439), to the Archbishopric of Trier (1446) and the County of Lower Isenburg (1460)
Gerlach III?1458-14886 May 1488Lower IsenburgJutta of Eppenstein
(d.1421)
four children
Louis II14221461-15114 June 1511Isenburg-BüdingenMaria of Nassau-Wiesbaden-Idstein
(1438-10 January 1480)
1 December 1452
ten children
Gerlach IV?1488-150218 July 1502Lower IsenburgHildegard von Zirk
(1430-1478)
seven children		 Sons of Gerlach II, ruled jointly.
James14561488-150217 January 1505Lower IsenburgUnmarried
Salentin VII14701502-153424 September 1534Isenburg-NeumagenElisabeth of Hunolstein-Neumagen
(1475-4 June 1538)
nine children		 Sons of Gerlach II, ruled jointly. After Gerlach's death, his sons divided the county.
Gerlach V14901502-15309 September 1530Isenburg-GrenzauAnastasia of Moers
(d.24 October 1557)
5 July 1494
eleven children
Philip I20 March 14671511-152622 February 1526Isenburg-RonneburgAmalia of Rieneck
(29 November 1478 – 1543)
17 June 1516
Arnstadt
six children		 Sons of Louis II, divided the county between them.
John III14761511-153318 May 1533Isenburg-BirsteinAnna of Schwarzburg-Blankenburg
(23 February 1497 – 1546)
17 June 1516
Arnstadt
seven children
Anton I2 August 15011526-156025 October 1560Isenburg-RonneburgElisabeth of Wied
(1508-24 July 1542)
17 June 1516
sixteen children

Katharina Gumpel
(1530-18 September 1559)
16 February 1554
four children
Henry the Elder5 January 15211530-15531553Isenburg-GrenzauMargaret of Wertheim
(d.25 March 1538)
2 September 1533
five children
Reinhard15181533-156828 February 1568Isenburg-BirsteinElisabeth of Waldeck-Wildungen
(10 December 1525 – 30 March 1543)
1542
one child

Margaret of Mansfeld
(1520-1573)
4 May 1551
Rudolstadt
no children		 Sons of John III, ruled jointly.
Philip II23 May 15261533-15965 April 1596Isenburg-BirsteinIrmengard of Solma-Braunfels
(1536-1 October 1577)
31 October 1559
Birstein
ten children
Louis III30 May 15291533-15887 February 1588Isenburg-BirsteinAnna Sybilla of Schwarzburg
(25 October 1540 – 3 August 1578)
24 June 1571
Arnstadt
four children

Maria of Hohnstein
(1558-2 February 1586)
13 August 1581
Offenbach
two children
Henryc.15001534-155413 February 1554Isenburg-NeumagenAntonia Penelope van Brederode
(d.30 June 1591)
4 September 1547
ten children		 Sons of Salentin VII, ruled jointly. After their childless deaths, the county is inherited by his brother-in law, the count of Sayn.
Salentin VIIIc.15001534-15541544Isenburg-NeumagenUnmarried
Neumagen annexed to the County of Sayn
John Henry15341553-156515 November 1565Isenburg-GrenzauErica of Manderscheid-Schleiden
(d.23 December 1587)
22 August 1563
Grenzau
no children
George10 September 15281560-157729 June 1577Isenburg-Ronneburg
(from 1566 in Ronneburg)		Barbara of Wertheim
(1531-17 September 1600)
21 May 1552
no children		 Sons of Anton, ruled jointly. After Henry's death in 1601, Ronneburg was annexed back to Birstein.
Wolfgang12 June 15331560-159720 December 1597Isenburg-Ronneburg
(from 1566 in Kelsterbach)		Johanna of Hanau-Lichtenstein
(4 April 1543 – 3 December 1599)
26 October 1563
(annulled 1573)
one child

Ursula of Solms-Braunfels
(1535-21 January 1585)
16 December 1577
no children

Ursula of Gleichen-Remda
(d. September 1625)
19 September 1585
no children
Henry13 September 15371561-160131 May 1601Isenburg-Ronneburg
(1566-1597 in Ronneburg; in all county from 1597)		Maria of Rappoltstein
(5 July 1551 – 15 October 1571)
1569
no children

Elisabeth of Gleichen-Tona
(1554-19 July 1616)
1572
no children
Isenburg-Ronneburg was annexed to Isenburg-Birstein
Salentin IX15321565-161019 March 1610Isenburg-GrenzauAntonia Wilhelmina of Arenberg
(1 March 1557 - 26 February 1626)
10 December 1577
two children
Wolfgang Ernest I29 December 15601596-163321 May 1633Isenburg-BirsteinAnna of Gleichen-Remda
(1565-3 March 1598)
26 September 1585
Birstein
eight children

Elisabeth of Nassau-Dillenburg
(24 January 1564 – 5 May 1611)
16 April 1603
Frankfurt am Main
one child

Juliana of Sayn-Wittgenstein
(26 February 1583 – 8 February 1627)
19 April 1616
four children		Son of Philip II.
Salentin Xc.15801610-16195 December 1619Isenburg-GrenzauUnmarriedDied childless.
Ernest15841619-166430 May 1664Isenburg-GrenzauCaroline Ernestine of Arenberg
(6 September 1606 - 12 September 1630)
1 September 1625
no children

Maria Anna of Hohenzollern-Hechingen
(1614 - 7 March 1670)
1636
Fürstenberg
one child		Brother of Salentin X. Left no descendants.
Grenzau divided between the Archbishopric of Trier, Archbishopric of Cologne and Abbots of Fulda
William Otto6 November 15971633-166717 July 1667Isenburg-BirsteinCatharina Elisabeth of Hanau-Munzenberg
(1 September 1607 - 24 September 1647)
7 November 1628
no children

Anna Amalia of Nassau-Dillenburg
(19 July 1599 – 4 May 1667)
24 October 1648
Birstein
no children		 Sons of Wolfgang Ernest I, divided the land between them. William Otto didn't have descendants and his feud was briefly annexed to Offenbach, before it generates a new branch in 1685.
Council of Regency, in Büdingen only (1633-1643)
John Ernest I21 June 16251633-16738 October 1673Isenburg-BüdingenMaria Charlotte of Erbach-Erbach
(24 March 1631 – 8 June 1693)
15 June 1650
Wechsterbach
twelve children
Wolfgang Henry21 October 15881633-163827 February 1638Isenburg-OffenbachMaria Magdalene of Nassau-Wiesbaden-Idstein
(11 August 1592 – 13 January 1654)
12 September 1609
Büdingen
thirteen children
Isenburg-Birstein annexed to Isenburg-Offenbach
Regency of Maria Magdalene of Nassau-Wiesbaden-Idstein (1638-1640)
John Louis14 February 16221638-168523 February 1685Isenburg-OffenbachMaria Juliana of Hanau-Munzenberg
(15 January 1617 – 28 October 1643)
7 October 1643
Hanau
no children

Louise of Nassau-Dillenburg
(22 May 1623 – 17 November 1685)
10 February 1646
Dillenburg
eleven children

Maria Juliana Blingen
(d.1677)
27 January 1666
Hanau
(morganatic)
six children
Regency of Maria Charlotte of Erbach-Erbach (1673-1691) Sons of John Ernest I, ruled under their mother during their minority, and then divided the land once more.
John Casimir10 July 16601673-169323 September 1693Isenburg-BüdingenSophie Elisabeth of Isenburg-Offenbach
(10 July 1650 – 3 September 1692)
12 April c.1680
Offenbach am Main
eight children
Ferdinand Maximilian I3 January 16621673-170314 March 1703Isenburg-WachtersbachAlbertine Maria of Sayn-Wittgenstein-Berleburg
(29 January 1663 – 29 November 1711)
1 July 1685
Berleburg
fourteen children
George Albert1 May 16641673-172411 February 1724Isenburg-MeerholzAmalia Henriette of Sayn-Wittgenstein-Berleburg
(9 September 1663 – 21 April 1707)
11 July 1691
Meerholz
six children
Charles Augustus27 January 16671673-172516 March 1725Isenburg-MarienbornAnna Belgica Florentina of Solms-Laubach
(9 September 1663 – 21 April 1707)
5 May 1690
Laubach
four children
Isenburg-Marienborn was annexed to Isenburg-Wachtersbach
John Philip3 December 16551685-171821 September 1718Isenburg-OffenbachCharlotte Amalia of Palatinate-Zweibrücken-Landsberg
(24 May 1653 – 9 August 1707)19 July 1678
no children

Frederica Wilhelmina Charlotte of Sayn-Wittgenstein-Berleburg
(23 June 1684 – 26 June 1731)
22 July 1708
one child		 Sons of John Louis, redivided the land between them.
William Maurice I3 August 16571685-17118 March 1711Isenburg-BirsteinAnna Amalia of Isenburg-Büdingen
(23 October 1653 – 12 March 1700)
3 November 1679
Birstein
sixteen children

Anna Ernestina Sofia von Kvernheim
(1660-30 September 1708)
1700
no children

Wilhelmina Elizabeth of Leiningen-Dagsburg-Falkenburg
(13 April 1659 – 15 September 1733)
1709
Niederweisel
no children
Council of Regency (1693-1701) Died childless.
John Ernest II3 April 16831693-170831 May 1708Isenburg-BüdingenUnmarried
Regency of Albertine Maria of Sayn-Wittgenstein-Berleburg (1703-1710)
Ferdinand Maximilian II12 January 16921703-175522 April 1755Isenburg-WachtersbachAlbertine Ernestine of Isenburg-Büdingen
(25 August 1692 – 11 June 1724)
28 May 1713
Büdingen
nine children

Ernestine Wilhelmine of Stolberg-Gedern
(2 January 1695 – 7 May 1759)
7 December 1725
Wechtersbach
eight children
Ernest Casimir I12 May 16871708-174915 October 1749Isenburg-BüdingenChristine Eleonore of Stolberg-Gedern
(12 September 1692 – 30 January 1745)
8 August 1708
Gedern
eight children		Brother of John Ernest II.
Wolfgang Ernest I5 April 16661711-175415 April 1754Isenburg-BirsteinFriederike Elisabeth of Leiningen-Dagsburg-Hartenburg
(16 January 1681 – 11 January 1717)
27 November 1707
Weilburg
seven children

Elisabeth Charlotte of Isenburg-Marienborn
(7 November 1695 – 23 September 1723)
27 January 1719
Marienborn
two children

Charlotte Amalia of Isenburg-Meerholz
(1 September 1692 – 10 January 1752)
22 May 1725
six children		 Sons of William Maurice I, divided the land between them.
William Maurice II23 July 16881711-17727 March 1772Isenburg-PhilippseichAmalia Louisa von Donna-Lauk-Reichertswalde
(27 February 1763 – 20 April 1800)
3 January 1712
Birstein
three children

Philippine Louise of Stolberg-Gedern
(2 October 1705 – 1 November 1744)
2 April 1725
Gedern
twelve children
Charles27 November 17001724-177414 March 1774Isenburg-MeerholzElisabeth Friederike Juliana of Solms-Rodelheim-Assenheim
(23 September 1703 – 1 June 1762)
11 July 1691
Meerholz
twelve children
Gustav Frederick7 August 17151749-176812 February 1768Isenburg-BüdingenDorothea Benedikta von Reventlow
(13 October 1734 – 20 December 1766)
21 November 1749
Fünen
six children

Auguste Friederike of Stolberg-Wernigerode
(4 September 1743 – 9 January 1783)
5 December 1767
Wernigerode
eight children		Left no surviving heirs.
Wolfgang Ernest II17 November 17351754-18033 February 1803Isenburg-BirsteinSophie Charlotte Ernestina of Anhalt-Bernburg-Schaumburg-Hoym
(3 April 1743 – 5 December 1781)
20 September 1760
Schaumburg Castle
seven children

Ernestine Esperance Victoria of Reuss-Greiz
(20 January 1756 – 2 December 1819)
20 August 1783
no children		Grandson of Wolfgang Ernest I. His father was Wiliam Emich Christoph, son of Wolfgang Ernest I.
Ferdinand Casimir I19 January 17161755-177816 September 1778Isenburg-WachtersbachAuguste Karoline of Isenburg-Büdingen
(15 July 1722 – 30 November 1758)
7 July 1750
Büdingen
two children
Louis Casimir25 August 17101768-177515 December 1775Isenburg-BüdingenAuguste Friederike of Stolberg-Wernigerode
(4 September 1743 – 9 January 1783)
24 September 1768
Christinenhof
eight children		Brother of Gustav Frederick, married his widow, but died also childless.
Christian Charles28 June 17321772-177926 March 1779Isenburg-PhilippseichConstance Sophie of Sayn-Wittgenstein-Berleburg
(11 April 1733 – 8 January 1776)
13 June 1762
Philippseich
seven children
John Frederick William2 May 17291774-18024 May 1802Isenburg-MeerholzKaroline of Salm
(20 April 1734 – 11 May 1791)
11 June 1762
Grumbach
eight children
Ernest Casimir II25 February 17571775-180125 February 1801Isenburg-BüdingenEleonore of Bentheim-Steinfurt
(26 April 1754 – 18 February 1827)
25 July 1779
Burgsteinfurt
eight children
Ferdinand Casimir II17 October 17521778-17801 December 1780Isenburg-WachtersbachAuguste Louise Clementine Hedwig of Bentheim-Steinfurt
(23 September 1755 – 15 November 1798)
29 April 1755
Siegen
no children		Left no heirs. The county passed to his uncle.
Council of Regency (1779-1781) Left no heirs.
Charles William Ernest20 October 17671779-178130 January 1781Isenburg-PhilippseichUnmarried
Albert Augustus14 April 17171780-178225 November 1782Isenburg-WachtersbachSophia Dorothea Wilhelmina van Rehren
(15 June 1706 – 23 October 1758)
22 April 1756
Almelo
no children

Charlotte of Hesse-Philippsthal-Barchfeld
(26 April 1725 – 9 January 1798)
9 June 1765
Meiningen
no children		Brother of Ferdinand Casimir I. Like him, he didn't have children.
Council of Regency (1781-1788) Brother of Charles William Ernest. In 1806, by German mediatisation, all Isenburg lands were absorbed into Isenburg-Birstein.
Henry Ferdinand15 October 17701781-180627 December 1838Isenburg-PhilippseichAmalia Isabella Sidonia von Bentheim-Tecklenburg
(6 December 1768 – 6 August 1822)
13 July 1789
Lemgo
nine children
Isenburg-Philippseich absorbed into Isenburg-Birstein
William Reinhard5 May 17191782-17855 August 1785Isenburg-WachtersbachAuguste Louise Clementine Hedwig of Bentheim-Steinfurt
(23 September 1755 – 15 November 1798)
20 February 1784
Wachtersbach
no children		Brother of Ferdinand Casimir I and Albert Augustus. Married his sister-in-law, but didn't have heirs.
Adolph I20 August 17221785-179819 April 1798Isenburg-WachtersbachUnmarriedBrother of Ferdinand Casimir, Albert Augustus and William Reinhard. He also didn't have heirs.
Louis Maximilian I28 August 17411798-180523 June 1805Isenburg-WachtersbachAuguste of Sayn-Wittgenstein-Hohenstein
(27 February 1763 – 20 April 1800)
26 April 1789
Wittgenstein
four children		Last son of Ferdinand Maximilian II.
Ernest Casimir III20 January 17811801-18061 December 1852Isenburg-BüdingenFerdinande of Erbach-Schönberg
(23 July 1784 – 24 September 1848)
10 May 1804
Zwingenberg
eight children		In 1806, by German mediatisation, all Isenburg lands were absorbed into Isenburg-Birstein.
Isenburg-Büdingen absorbed into Isenburg-Birstein
Charles William Louis7 May 17631802-180617 April 1832Isenburg-MeerholzKaroline of Sayn-Wittgenstein-Hohenstein
(13 September 1764 – 28 April 1833)
29 March 1785
Wittgenstein
six children		In 1806, by German mediatisation, all Isenburg lands were absorbed into Isenburg-Birstein.
Isenburg-Meerholz absorbed into Isenburg-Birstein
Regency of Charles, Count of Isenburg-Birstein (1805-1806) In 1806, by German mediatisation, all Isenburg lands were absorbed into Isenburg-Birstein.
Louis Maximilian II21 May 17911805-180625 February 1821Isenburg-WachtersbachUnmarried
Isenburg-Wachtersbach absorbed into Isenburg-Birstein
Charles 29 June 1766 1803-1806 21 March 1820 Isenburg-Birstein Charlotte Auguste of Erbach-Erbach
16 September 1795
Erbach
six children		 In 1806, in the advent of the German mediatization, his county was chosen as the one to which all the others were absorbed to. He was then raised as Prince of Isenburg. However, in 1815, his own Principality was also absorbed, this time to the Electorate of Hesse.
1806-1815Principality of Isenburg
Isenburg was annexed to the Electorate of Hesse

Lines of succession

Mediatized line of Birstein (1815)
  • Charles, 1st Prince 1803-1820 (1766-1820)
    • Wolfgang Ernst, 2nd Prince 1820-1866 (1798-1866)
    • Prince Victor (1802-1843)
      • Karl, 3rd Prince 1866-1899 (1838-1899)
        • Prince Leopold (1866-1933) -renounced his rights in 1898
        • Franz Joseph, 4th Prince 1899-1939 (1869-1939)
          • Franz Ferdinand, 5th Prince 1939-1956 (1901-1956)
            • Franz Alexander, 6th Prince 1956–2018 (1943-2018)
              • Alexander, 7th Prince 2018–present (1969) ∞ Sarah Lorenz
                • Princess Alix (2015)
                • Princess Zita (2017)
                • Franz Salvator, Hereditary Prince (2019)
              • Princess Katharina (1971) ∞ Archduke Martin of Austria
              • Princess Isabelle (1973) ∞ Carl, Prince of Wied
              • Princess Sophie (1978) ∞ Georg Friedrich, Prince of Prussia
              • Prince Viktor (1979) ∞ Jungeun Anes Lee
                • Princess Amalia (2016)
                • Princess Victoria (2018)

Mediatized line of Büdingen (1806)
  • Ernest Casimir III (1806-1848), in 1840 he was raised to Prince.
  • Ernest Casimir IV (1848-1861)
  • Bruno (1861-1906)
  • Wolfgang (1906-1920)
  • Alfred (1920-1922)
  • Karl (1922-1941)
  • Otto Friedrich (1904-1990), from the Ysenburg-Büdingen-Wächtersbach branch, adopted by Karl in 1936
  • Wolfgang-Ernst, 8th Prince 1990- (b.1936) ∞ Leonille Princess of Sayn-Wittgenstein-Berleburg
    • Hereditary Prince Casimir-Alexander (b.1967)
      • Prince Tristan Alexander (b.2014)
    • Prince Maximilian (b.1969)
      • Prince Tassilo-Alexander (b.2006)

Notable members of the family

References
  1. Treitschke, Heinrich. History of Germany in the Nineteenth Century, Vol. I, page 609.
  2. Hess, J. (ed.) (1901), Die Urkunde des Pfarrarchivs von St Severin in Köln, Köln, "Köln St Severin", 5, p. 8.
  3. Niederrheins Urkundenbuch, Band I, 286, p. 187.
  4. Codex diplomaticus Rheno-Mosellanus, Theil I, 247, p. 500.
  5. Isenburg-Wied-Runkel (1775), Urkunden, LXXIII, p. 88
  6. Codex diplomaticus Rheno-Mosellanus, Theil II, 247, p. 376
  7. Isenburg-Wied-Runkel (1775), Urkunden, LVI, 73.
  8. Milmeister (2003), p. 60.
  9. Clervaux (1883), 501, p.100.
  10. Sometimes numbered II in reference to his uncle, Henry, who died in 1298, even before his father's ascension.
  11. Isenburg-Wied-Runkel (1775), Urkunden, CIII, 120.
  • Official Website – Fürstenhaus Isenburg (Princely House of Isenburg) (in German)

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