Duke William V deAquitaine

William V's father was Count William IV deAquitaine and his mother was Emma of Blois (de Champagne).  His paternal grandparents were Duke William III deAquitaine and Adela Gerloc of Normandy; his maternal grandparents were Theobald "Le Tricheur" of Blois and Luitgardeof Vermandois.  He was an only child.

They had two sons named William Peter V and William VIII.