Franois de Vendme, Duc de Beaufort was the son of Csar de Vendme and Franoise de Lorraine. He was a prominent figure in the Fronde, and later went on to fight in the Mediterranean. His mother was the heiress Franoise de Lorraine. He is sometimes called Franois de Vendme, though he was born into the House of Bourbon, Vendme coming from his fathers title of Duke of Vendme.
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Source: Wikipedia