1Douglas Richardson, Magna Carta Ancestry, p. 28 (2005).
"1. WILLIAM D'AUBENEY , of Belvoir and Bottesford, Leicestershire, Uffington, Woolsthorpem and Wyville, Lincolnshire, Stoke Albany, Northamptonshire, etc., Sheriff of Warwickshire and Leicestershire, of Rutland, and of Buckinghamshire and Bedfordshire, son and heir of William d'Aubeney, of Belvoir, Leicestershire, by Maud, daughter of Robert Fitz Richard. He was a minor when he succeeded his father in 1168. He married (1st) MARGARET (or MARGERY) DE UMFREVILLE, daughter of Odinel de Umfreville, of Prudhow, Northumberland, by Alice, daughter of Richard de Lucy, Knt., of Chipping Ongar, Essex, Vhief Justiciar of England. They had four sons, William, Odinel, Robert, and Nicholas (clerk) [Rector of Bottesford, Lincolnshire]. He fought in Normandy 1192 1nd 1194. His wife Margaret (or Margery), died 20 September, year unknown, and was buried in Belvoir Priory, Leicestershire. He married (2nd) about 29 Sept. 1198 AGATHA TRUSSEBUT, widow of hamo Fitz Hamo (died 1196/7), of Wolverton, Buckinghamshire, and daughter of William Trussebut, of Warter in Holderness, East Riding, Baron of Hunsingore, Yorkshire , by his wife, Aubrey de Harcourt. They had no issue.
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WILLIAM D'AUBENEY died 7 May 1236, and was buried at Newstead, Lincolnshire, his heart at Belvoir Priory, Leicestershire. Following his death, his widow Agatha, was again in royal favour, receiving gifts in 1236 and 1240.
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She died at Chalfont St. Giles, Buckinghamshire shortly before 28 Feb. 1247.".