The Counts of Nassau were a noble family that played a significant role in the history of the Holy Roman Empire and the Netherlands. Originating in the 11th century, they held the title of count and governed various territories, including Nassau in present-day Germany. Their influence grew over the centuries, leading to important political and military positions. One of the most notable branches of the family was the House of Orange-Nassau, which became prominent in the Dutch Republic. Members of this house, such as William of Orange, were key figures in the struggle for independence from Spanish rule, shaping the future of the Netherlands.