René I, Viscount of Rohan

René I de Rohan, (1516–1552) 18th Viscount of Rohan, Viscount and Prince de Léon, and Marquis de Blain married Isabella of Navarre daughter of jure uxoris King John III of Navarre and Catherine of Navarre, Queen of Navarre.

Queen Margaret of Navarre, sister of Francis I of France served as guardian of René, and arranged for René to marry her sister-in-law Isabella.

A family who would fight on Protestant side in the Huguenot rebellions.

René died in 1552 fighting on the Holy Roman Empire frontier during the Siege of Metz.

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