Sybilla of Conversano (? - February 1103) was the daughter of Geoffrey, Count of Conversano and an unknown mother. She was married to Robert III, Duke of Normandy (c1051-1134), the eldest son of William I of England and Matilda of Flanders.
Father: Geoffrey, Count of Conversano
Wedding: 1100, Apulia
Death: 1103, Rouen