Eberhard IV, Count of Württemberg

Eberhard was elder son of Count Eberhard III and Antonia Visconti. On 13 November 1397 he became engaged to Henriette of Mömpelgard. Henriette was the oldest daughter and main heiress of Henry of Mömpelgard, who died in 1396 one year before his father, Count Stephan of Mömpelgard. Their marriage, which occurred in 1407 at the latest, caused the county of Mömpelgard to become part of Württemberg.[1] Eberhard IV also had a child with Agnes von Dagersheim, (Elisabeth von Dagersheim X Conrad Lyher).

Eberhard took active part in management of the state from 1407. Starting 1409 he governed the county of Mömpelgard together with Henriette. After the death of Eberhard III on 16 May 1417, he became the ruler of all of Württemberg. At the time of his death on 2 July 1419, Eberhard's two sons, Louis, who would later become Count Louis I, and Ulrich, later Count Ulrich V, were only seven and six years old, respectively. A guardianship government of Henriette and up to 32 Württembergian councilors was instituted.

Eberhard was married to Henriette, Countess of Montbéliard and they had:

1. Anna of Württemberg (1408–1471), married Philip I, Count of Katzenelnbogen
2. Louis I of Württemberg (1412 – 24 September 1450, Urach).
3. Ulrich V of Württemberg (1413 – 1 September 1480, Leonberg).

• Debard, Jean-Marc (1980). Les monnaies de la principauté de Montbéliard du 16e au 18e siècles: Essai de Numismatique et d'Histoire Economique (in French). Annales Litteraires de l'Universite de Besancon.16