He [Robert de Ufford] married, 1stly, before 12 May 1273, Mary, widow of William DE SAY (died shortly before 12 February 1271/2. She was living, 10 August 1280. He married, 2ndly, before 1286-87, Joan. He died shortly before 9 September 1298. His widow was living, 18 November 1307. [Complete Peerage XII/2:148-9, (transcribed by Dave Utzinger)]
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[William de Say m.] Mary (married 2nd by May 1273 Robert de Ufford, ancestor of the Earls of Suffolk of the March 1336/7 creation. [Burke's Peerage]
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He [William de Say] married, 1stly, Sibyl, and, 2ndly, Mary. He died before 12 February 1271/2. Mary survived him and married, in or before May 1273, Robert DE UFFORD, Justiciary of Ireland 1276-81, and ancestor of the UFFORD EARLS OF SUFFOLK. [Complete Peerage XI:470-3, (transcribed by Dave Utzinger)]