Joanna of Hainaut

Joanna of Hainault
Born1315 (1315)
Died1374 (aged 58–59)
Noble familyHouse of Avesnes
SpouseWilliam V, Duke of Jülich
Issue
Detail
Gerhard VI of Jülich, Count of Berg and Ravensberg
William II, Duke of Jülich
FatherWilliam I, Count of Hainaut
MotherJoan of Valois

Joanna of Hainault (c. 1312–1374) was a Duchess of Jülich by marriage to William V, Duke of Jülich. She was the third daughter of William I, "The Good" Count of Hainaut, and Joan of Valois. She was a younger sister of Philippa of Hainault, Queen of England, and Margaret II, Countess of Hainault.