Dietrich VIII, Count of Cleves

Dietrich VIII (c. 1291–1347) ruled the County of Cleves from 1310, when he succeeded his half-brother Otto and defeated the claims of Otto's widow and her allies, among them the archbishop of Cologne. In 1318 he settled the succession with his younger brother John, who would inherit if Dietrich had no sons.

He married Margaret of Guelders in 1308 and Maria of Jülich in 1340. He encouraged internal colonization, raised Uedem and Sonsbeck to town status, and founded the collegiate church at Kleve. His brother John succeeded him.