Duke William  I     "Longsword" Normandy

Duke William  I     "Longsword"'s father was Duke Rollo Normandy and his mother was Duchess Poppa Normandy.  His maternal grandfather was Berenger of Bayeaux. He had a brother and three sisters, and also a sibling of unknown gender, named Robert of Corbeil, Kathlin, Adele, Gerletta and Crespina.

They had a son named Duke Richard  I.