Joanna of Hainaut

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.

Life After her marriage, Joanna visited her mother Joan of Valois in January or February to May 1326, and the mother and daughter visited Joanna's sister Philipa, Queen of England, in 1329. Their children were as follows:

Gerhard VI of Jülich, Count of Berg and Ravensberg, married Margaret of Ravensberg, heiress of Berg and Ravensberg. Grandfather of Adolph I, Duke of Cleves. William II, Duke of Jülich, married Maria of Guelders.