William III, Count of Holland was a nobleman who ruled during the late 14th century. He was born around 1350 and became the Count of Holland in 1389. His reign was marked by efforts to strengthen the region's economy and political stability, as well as conflicts with neighboring territories. William III was a member of the House of Avesnes, which played a significant role in the politics of the Low Countries. He was known for his military leadership and involvement in various battles, including those against the Duchy of Brabant. His legacy includes contributions to the development of Holland's governance and territorial integrity.