William XI of Auvergne

William XI was count of Auvergne and Boulogne from 1277, when his father Robert V died after naming William his heir to both counties in a will of 11 January. His mother was Éléonore de Baffie.

After about three years he died in 1280. He married an unnamed daughter of Humbert V of Beaujeu, constable of France, and was buried at Bouschet Abbey. His brother Robert VI succeeded him.