Osbern FitzOsbern

Osbern FitzOsbern (d. 1103) was a Norman churchman. He was a relative of King Edward the Confessor as well as being a royal chaplain. During Edward's reign he received the church at Bosham, near Chichester. He was a steward for King William I of England during his reign, as well as being a friend of the king. The story that he became William's chancellor is based entirely on a charter that modern historians have declared mostly spurious. Osbern did not attend the church council held by Anselm, the new Archbishop of Canterbury in 1102, as he was ill.

Osbern became embroiled in a dispute with the monks of Battle Abbey, who had established a priory in Exeter. The cathedral chapter of Exeter objected to the priory establishing a graveyard or ringing their bells, and both sides appealed to Anselm, who ruled in Battle's favour on the bell issue. The dispute over the graveyard was still ongoing in 1102, when Pope Paschal II wrote to Osbern ordering him to allow the priory to establish a graveyard for their benefactors.

Osbern died in 1103, having gone blind before his death. Frank Barlow, a medieval historian, described Osbern as "unsociable".

William FitzOsbern, Earl of Hereford was his brother. Their father was Osbern de Crépon, a guardian and seneschal to the young Duke William.