Gilbert FitzRoy
Encyclopedia
Gilbert FitzRoy was an illegitimate son of Henry I of England
Henry I of England
Henry I was the fourth son of William I of England. He succeeded his elder brother William II as King of England in 1100 and defeated his eldest brother, Robert Curthose, to become Duke of Normandy in 1106...

. His maternity is unknown as well as most everything about him, except that he died sometime after 1142.
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