Louis II, Count of Sancerre

Louis II (c. 1305–1346), Count of Sancerre, was the son of John II and Louise de Beaumez. On 8 July 1329 he married Béatrix de Roucy, daughter of Count John V of Roucy; of their seven children John III succeeded, and Louis de Sancerre rose to be Marshal and then Constable of France.

In summer 1346 he reportedly served in Normandy under Constable Raoul II de Brienne, and on 26 August he was killed at Crécy beside his father-in-law. By one account he was among the French captains who broke into the first English division under the young Prince of Wales.

In 1334 he reached an agreement with the lord of Sagonne over the inheritance of Thibaud, Bishop of Tournai. Edward III had his body recovered and buried at Maintenay abbey.