Jeanne of Hainault, Countess of Soissons

Jeanne de Beaumont, also called Jeanne of Hainault (1323–1350), was ruling countess of Soissons from 1344, daughter of John of Beaumont and Margaret of Soissons. In 1340 she married Louis of Châtillon, heir to Blois; her three sons all later became counts of Blois, two of them also holding Soissons.

Louis was killed at Crécy in 1346, after which Jeanne remarried William I, Marquis of Namur; they had no children. She ruled Soissons until she died of the Black Death in December 1350.