William of Poitiers

William of Poitiers (1309–1374) was destined for the Church, one of three sons of Count Aymar V of Valentinois and Sibylle des Baux who became bishops. A Cluniac monk, he became prior of La Charité-sur-Loire in 1339 and was elected bishop of Langres in 1345.

He served in King John II's army in 1353. The next year armed captains appeared before Langres to seize the city, and the bishop was accused of conspiring with them to hand it to the English; he obtained absolution.

While still a monk he had fathered several children by different women, and as bishop he legitimized four of them. He died on 6 September 1374.