Osbern Giffard, was the son of Osborne de Bolbec and Avelina de Crepon.
He was one of the knights who invaded England under his cousin, William the Conqueror, in 1066. He was rewarded with holdings throughout Gloucestershire, Hampshire, Wiltshire and Somerset. He settled in Brimpsfield, where he built a castle which was destroyed by Edward II in 1322. It is believed that the Gloucestershire village of Stoke Gifford is named after him. Giffard's nephew, Walter became the 1st Earl of Buckingham