William II, Count of Hainaut, was a nobleman who lived during the 13th century. He was born around 1280 and became the Count of Hainaut in 1304. His reign was marked by efforts to strengthen his territory and maintain peace among the local nobility. He was also known for his involvement in regional politics and alliances. In addition to his role as Count, William II was connected to the House of Avesnes, a prominent noble family. He was the son of John I, Count of Hainaut and Philippa of Luxembourg. His marriage to Joan of Valois further solidified his political alliances, enhancing his influence in the region.