Adolf III of the Mark

Adolf III of the Mark (c. 1334–1394), second son of Adolf II and Margaret of Cleves, was made Bishop of Münster in 1357 and briefly served as Archbishop-Elector of Cologne in 1363, resigning to pursue the Cleves inheritance. He succeeded the childless Count John of Cleves in 1368.

In 1369 he married Margaret of Jülich. After his brother Engelbert III died without heirs in 1391, he inherited the Mark also and gave it to his son Dietrich in 1393.