Jean IV de Brosse

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Jean IV de Brosse (1505–1564) was the son of René de Brosse and Jeanne de Commines (daughter of Philippe de Commines).

After the death of his father at the Battle of Pavia, he succeeded him as Count of Penthièvre.

In 1533, he married Anne de Pisseleu d'Heilly, the mistress of Francis I of France, and was shortly thereafter created count, then duke of Étampes. However, he was greatly impoverished by the expenditures necessary to maintain their position at court. With the death of Francis I, the antipathy of Diane de Poitiers compelled Jean to retreat to Brittany, where he had been appointed governor in 1543; she also obtained his duchy of Étampes. After the death of Henry II of France and the fall of Diane, he was able to regain the duchy, but died not long thereafter.

Preceded by René	Comte de Penthièvre 1525–1564	Succeeded by Sebastian
Preceded by Jean	Comte d'Étampes 1534–1536	Succeeded by elevated to Duchy
Preceded by elevated from County	Duc d'Étampes 1536–1553	Succeeded by Diane
Preceded by elevated from Barony	Duc de Chevreuse 1545–1555	Succeeded by Charles I
Preceded by Diane	Duc d'Étampes 1562–1564	Succeeded by to royal domain