William I Longsword, Duke
| Father | Rolf or Rollo The Ganger, Duke of Normandy |
| Mother | Popa or Papie |
| Birth* | William I Longsword, Duke was born circa 900. |
| He was the son of Rolf or Rollo The Ganger, Duke of Normandy and Popa or Papie. | |
| Marriage* | William I Longsword, Duke married Sprota. |
| Marriage* | William I Longsword, Duke married Liutgarde, daughter of Herbert II Compte de Vermandois and Hildebrande of France. |
| Marriage* | William I Longsword, Duke married Asperleng of Vaudreuil. |
| Death* | William I Longsword, Duke died on 17 December 942. |
Family 1 | Asperleng of Vaudreuil |
| Child |
Family 2 | Sprota |
| Child |