?Mabel, daughter and (in her issue) heir of William Fitz Richard, a man of huge estates in Cornwall. [Complete Peerage, III:429 as corrected by XIV:207]
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Mabel, d. by 1162, daughter of Richard Fitz Richard, Lord of Cardinan, Cornwall, and granddaughter of Robert de Mortain. [Ancestral Roots, line 121-26]