Gerard Grenville1 
He witnessed a charter of his uncle Walter Giffard, Earl of Buckingham, of whom he held three knight’s fees.1
Robert Grenville1
Children of Robert Grenville
Gerard Grenville1
Children of Gerard Grenville and Dionysia de Turbeville
Henry de Turbeville1
Child of Henry de Turbeville
Dionysia de Turbeville1
Her married name became Grenville.
Children of Dionysia de Turbeville and Gerard Grenville
William Grenville1
He held the office of Keeper of Oxford Castle.1 He held the office of Sheriff of Oxfordshire and Berkshire in 1289/90.1
Children of William Grenville
Robert Grenville1
Children of Robert Grenville and Erneberche (?)
Erneberche (?)1
Attended KING JOHN to Poitou /4).1 Her married name became Grenville. With a younger son (William.1
Children of Erneberche (?) and Robert Grenville