Gaucher VIII de Châtillon, Lord of Châtillon and Troissy

Gaucher VIII de Châtillon (died 1377) was the eldest son of Jean II de Châtillon and Éléonore de Roye. A contract of September 1323 betrothed him while still a child to Jeanne de Guines. He succeeded his mother in La Ferté-en-Ponthieu and his father in Châtillon and Troissy.

After 1344 he married, as her fourth husband, Allemande Flotte de Revel, daughter of the chancellor of France and widow of Enguerrand de Coucy; their children were Jean, Gaucher and Jeanne. His will, made on 7 September 1377, was proved before the royal council on 15 December.