Gange-Rolfe/Rollo was also known as Ragnvalfsson (Rolf the Ganger), and as
Rolf Wend-a-Foor. He became known as Robert or Rollo once settled in
Normandy. He begat William I Longsword (2nd Duke of Normandy), who begat
Richard I the Fearless (3rd Duke of Normandy), who begat Richard II the Good
(4th Duke of Normandy), who begat Robert II the Devil (6th Duke of Normandy),
who had an illegitimate child by Herleva, named William the Conqueror.
William's great aunt Emma of Normandy (sister of William's grandfather Richard
II, was the wife of AEthelraed II the Unready (King of England) and who, after
AEthelraed's death married Sveynsson Canute II the Great, King of England and
Denmark (Knut). Emma's son was English King Edward the Confessor. Thus, Edward
the Confessor was William's first cousin once-removed.