The House of Nassau-Siegen is a branch of the larger House of Nassau, a noble family in Europe. It originated in the 16th century and became prominent in the regions of the Holy Roman Empire and the Netherlands. The family played a significant role in local politics and military affairs, often holding titles and lands in various territories. Members of the House of Nassau-Siegen were known for their military service and governance. They contributed to the development of the region and were involved in various conflicts, including the Eighty Years' War. The family's legacy continues through its descendants and historical influence in European nobility.