Harvey VII, Lord of Léon

In 1323 or 1326, Herve married Margaret of Retz, daughter of Girard III Chabot, Lord of Retz, and Mary of Parthenay. She died in 1333 or 1334 without issue.

After his first wife's death, he married Margaret of Avaugour (1302 – 20 June 1375), daughter of Henry IV of Avaugour, Lord of Goëllo and Mayenne, and Joan of Harcourt. Margaret was the aunt of Joan of Penthièvre, the daughter of Guy of Penthièvre and Joan of Avaugour, and niece of the Breton Duke John III. Harvey VII made several agreements concerning the share of Margaret's inheritance, his wife being her father's main heir. The rich heiress also claimed part of the inheritance of her grandfather Henry III as well as her aunt Blanche in lands in Normandy, Mayenne and Goëlo. She also owned a house in Paris, the "Maison d'Ardoise", located in the rue Saint-Denis.

The inheritance of the House of Avaugour brought about many disputes that would last until the late 14th century. These disputes pitted Herve VII and his wife against important figures such as the Bishops of Saint-Malo and Cornouaille, the seneschal of Quimper and Harvey IV, Lord of Pont-l'Abbé.

The couple had four children:[4]

• Harvey VIII of Léon, who succeeded his father.
• Joanna of Léon. In 1349, she married John I of Rohan, who inherited the lordship of Léon and Noyon in 1363. Noyon had belonged to a junior branch of the Lords of Léon. When her brother died childless in 1363, she brought the estates of Léon to John I. Their daughter Joanna of Rohan married firstly Robert of Alençon[5] in 1374, and secondly Peter II of Amboise.
• Mary of Léon, who married John of Kergorlay in 1362. She was widowed and married secondly John Mallet, Lord of Graville before 1369.
• Catherine de Léon, who married Henry of Plédran, a knight and councillor of Duke Charles and Duchess Joan. She married secondly a distant cousin, William of Léon, lord of Hacqueville, grandson of William of Léon, the brother of Harvey VI of Léon.

Herve VII of Léon is said to have had a fourth daughter, Margaret, who married Yvon of Trogoff, but this daughter is never mentioned in the division charters.

John of Montfort and Philip VI of France.

Due to Herve VII holding estates in France and Normandy he was also deemed a vassal of the French king. He participated in the French campaign in Flanders from the summer of 1340.[6]

After Duke John III the Good of Brittany died without an apparent heir, a dispute arose amongst the Dukes relatives. Although Herve VII was related to Joan of Penthièvre, he initially sided with John of Montfort, during the Breton War of Succession. John summoned an assembly of the great Breton lords in May 1341 in order to assert his rights to the throne of Brittany. Herve VII is said to have accompanied John of Montfort during his legendary tour around Brittany in June and July 1341 and to gather support for his cause.

In September, however the French King Philip VI of France acknowledged the other claimant, Charles of Blois Duke of Brittany through the rights of his wife Joan of Penthièvre as the new Duke.

In November, the French, with Charles of Blois Breton supporters besieged Nantes, then held by John of Montfort. Herve VII, who defended the city of Nantes, became the target of John of Montfort's reproaches after a disastrous sortie resulted in the death of many Breton knights. The town of Nantes was taken on 21 November 1341 after a three-week siege. John of Montfort was taken prisoner and imprisoned in the Louvre in Paris. His wife Joanna carried on the struggle on his behalf. The criticism made by John of Montfort to Herve VII resulted in Herve VII shifting his allegiance and he now sided with Charles of Blois. Herve VII went on to besiege the towns of Hennebont and Carhaix for the Franco-Breton alliance.

When he was at the episcopal manor of Trégarantec, Herve VII was captured by Walter Manny and Tanguy du Châtel and sent to England. He was exchanged with another Breton, Olivier IV de Clisson by the English for the Earl of Salisbury, who had been taken prisoner by the Franco-Bretons after the siege of Vannes.

He was taken prisoner once more, sent back to England and was released only after a ransom of 100,000 écus.[7] His wife is said to have gathered the ransom and the "Maison d'Ardoise" was sold in 1343 or 1344 to the Confrérie Saint-Jacques for pilgrims, for the modest sum of 620 livres which she apparently used "for the liberation of the said lord Herve of Léon, who was, as they said, a prisoner of the English king in the town of London"[7]

Herve VII apparently died “while returning to his country in the town of Angiers” probably in late 1344.

The chronicler Jean Froissart mentions his feats against the Spanish Moors and the Prussian pagans.