William IV of Auvergne

William IV (c. 950–1016) became count of Auvergne in 989, when his brother Guy I died without children. A son of Viscount Robert II of Clermont and Engelberga, he first appears in charters as the count's brother, countersigning gifts to Brioude and Sauxillanges.

Around 1000 he and his wife Umberga made donations for the souls of their children. Of these, Robert I succeeded as count, Stephen became bishop of Clermont, and Ermengarde married Count Odo II of Blois in 1005.