オラニエ＝ナッサウ家
The early House of Orange-Nassau extinguished in the male line with William III of England (d. 1702), while the later House of Orange-Nassau (and the present Dutch royal family) descend in the male line from William I's younger brother John, Count of Nassau-Dillenburg, and subsequently from the latter's fifth son, Count Ernst Casimir of Nassau-Dietz. The Nassau-Dietz branch is also known as the "Friesian branch" because its ruling counts served as stadtholders in Friesland and Groningen at the same time.