Richard Fitz Roy, natural son of King John by a daughter of the Earl of Warenne (perhaps a daughter of Hamelin Plantagenet); married Rohese, died 1264/5, daughter of Fulbert of Dover. [Ancestral Roots]
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Richard FitzRoy (died in or after 1232) by Rose, daughter and heiress of Robert of Dover, illegitimate son of King John. [Burke's Peerage]