Catharine, daughter and heir of Sir Bryan fitz Alan. [Magna Charta Sureties]
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He [John de Grey] married, 1stly, before 1 March 1311/2, Catherine, younger daughter and coheir of Sir Brian (FITZALAN), LORD FITZALAN, by his 2nd wife, Maud. [Complete Peerage VI:145-7, (tanscribed by Dave Utzinger)]