John III, Count of Nassau-Beilstein
John III, Count of Nassau-Beilstein (1490 – 11 December 1561) was a son of John II and his wife Maria of Solms-Braunfels. In 1513, he succeeded his father as Count of Nassau-Beilstein. In 1523, he married Anna (1505–1564), a daughter of Louis I (1473–1523) of Nassau-Weilburg and Margaret of Nassau-Wiesbaden (1487–1548). He died on 11 December 1561. As he had no male heir, Nassau-Beilstein fell back to Nassau-Dillenburg. He may have had a son, Jonas/Hans, but more documentation is needed to confirm. It is unclear why this son, if he existed, did not inherit his father's title. References 

House of Nassau
Counts of Nassau
1490 births
1561 deaths
16th-century German people