The "Prince of Nassau" refers to a title associated with the House of Nassau, a noble family in Europe. This family has historical ties to various regions, particularly in the Netherlands and Germany. The title has been held by several members over the centuries, often linked to governance and military leadership. The most notable figure associated with this title is William of Nassau, also known as William the Silent, who played a crucial role in the Dutch struggle for independence from Spanish rule in the 16th century. His legacy is significant in the history of the Netherlands and the broader context of European politics during that era.