William IV of Toulouse
1040 – 1094) was Count of Toulouse, Margrave of Provence, and Duke of Narbonne from 1061 to 1094. He succeeded his father Pons of Toulouse upon his death in 1061. His mother was Almodis de la Marche, but she was kidnapped by and subsequently married to Ramon Berenguer I, Count of Barcelona when William was a boy. He was married to Emma of Mortain (daughter of Robert, Count of Mortain and a niece of William of Normandy), who gave him one daughter, Philippa. He also had an illegitimate son, William-Jordan, with his half-sister Adelaide.