[1] In 1550, his position having become untenable due to his Protestantism, he considered leaving the French court and moving to Germany, but Francis II's death and Catherine de Medici's entreaties led him to abandon this plan.
He also took part in the assaults on Beaugency and Pons and the sieges of Nontron, Lusignan and Poitiers in summer 1569 before coming to the assistance of Châtellerault and fighting at Port-de-Piles and on 3 October 1569 at Moncontour.
After the peace of August 1570, he returned to the royal court, where his pleasant conversation and good spirits made him a confidant of the 20-year-old king Charles IX.
On the day of the massacre the Catholics found de La Rochefoucauld and brought him out of the palace, killing him with other Protestant noblemen in the neighbouring streets.
Silvia and Fulvia (Silvie and Fulvie in French) were both descendants of an elder brother of the philosopher Giovanni Pico della Mirandola.
Through his daughter Isabelle, he was a grandfather of Marie-Catherine de Senecey (1588–1677), the Première dame d'honneur to Queen Anne and royal governess to King Louis XIV.