Fulk FitzRoy was an illegitimate son of

Henry I of England Henry I (c. 1068 – 1 December 1135), also known as Henry Beauclerc, was King of England from 1100 to his death in 1135. He was the fourth son of William the Conqueror and was educated in Latin and the liberal arts. On William's death in ...

. He was perhaps the son of Ansfride, one of Henry's mistresses. He maybe was a monk at Abingdon Abbey. Little is known about him.Given-Wilson and Curteis ''Royal Bastards'' p. 71

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* 11th-century English people 12th-century English people Illegitimate children of Henry I of England English Christian monks Sons of kings {{England-bio-stub