 He was popular at the royal court, although his brother Louis and his cousin François de Rochechouart had been banished for their involvement in the Day of the Dupes in November 1630, when the enemies of Cardinal Richelieu mistakenly believed that they had succeeded in persuading Louis XIII to dismiss Richelieu from power.In 1632, he married Diane de Grandseigne (1615 – 11 February 1666), the daughter of Jean de Grandseigne, Marquis de Marsillac, and of Catherine de La Béraudière, "dame de Villenon".A year after his marriage, he was created a Knight of the Orders of the King.