He was the son of
Walter Giffard, Lord of Longueville (one of the few proven
companions of William the Conqueror at the
Battle of Hastings in 1066) and Ermengarde daughter of Gerard Flaitel. His father had been given 107 lordships, 48 of which were in Buckinghamshire which Giffard inherited by 1085. The
caput of his feudal
honor was at
Crendon, Buckinghamshire. He held an important castle at Longueville overlooking the
River Scie as well as vast estates in Buckinghamshire. As he held lands in both England and Normandy he was a vassal to both
Robert Curthose and
William Rufus. He died 15 July 1102 in England and his body was returned to Normandy, Giffard was married to
Agnes de Ribemont, sister of
Anselm of Ribemont. His heir was his son,
Walter Giffard, 2nd Earl of Buckingham. ==Notes==