He succeeded his brother as Prince of Capua.

He succeeded his father as Prince in Weilburg on 27 February 1719.

In 1775, he succeeded his father as Prince of Nassau-Usingen.

He succeeded as Prince of Lippe on his father's death on 4 April 1802.

William succeeded his father as Prince of Hohenzollern on 8 June 1905.

Together they had one son, Toljen II, who succeeded as Prince later in 1227-1239.

Robert, his eldest surviving son, succeeded him as Prince of Taranto in 1331.

After his father's death in 1464, he succeeded him as Prince of Grubenhagen.

After his father's death in 1715, he succeeded as Prince of Hohenzollern-Sigmaringen.

In 1817, he succeeded his father as Prince of Bentheim and Steinfurt.