Guillaume de Châteauvillain, Lord of Pleurs

Guillaume de Châteauvillain (c. 1310 – 17 April 1352) was the younger son of Jean II de Châteauvillain and Marie de Pierrepont. When the family lands were divided he received the lordships of Pleurs and Courcelles.

In 1342, after a quarrel, he and his elder brother Jean III marched armed onto the lands of the bishop of Langres and had to beg his pardon. He married Blanche de Châtillon-en-Bazois, and their daughter Marie inherited Courcelles.