Count William VI of Holland was a nobleman who ruled during the 14th century. He was born in 1330 and became the Count of Holland, Zeeland, and Hainaut in 1345. His reign was marked by efforts to strengthen the power of the nobility and manage conflicts within his territories. William VI was a member of the House of Avesnes, which played a significant role in the politics of the Low Countries. He died in 1381, and his death led to a succession crisis, impacting the future governance of the region and contributing to the ongoing struggles for power among local nobility.