Aymar IV of Poitiers

Aymar IV of Poitiers (c. 1250–1329), count of Valentinois and Diois, was the son of Aymar III. A minor in 1277, he inherited the Vivarais castles.

In 1280 he did homage to King Philip III for the county of Die, and in 1326 acknowledged the Vivarais castles as fiefs of King Charles IV. His first wife, Hippolyte of Burgundy, married in 1270, bore his successor Aymar V; his second wife Marguerite of Geneva mothered Anne and Catherine. He died in October 1329.