|Father||Hugh de Sandford d. 1233|
|Mother||Joan de Noers d. 1252|
Agnes was born. Agnes married Matthew Hussey in 1234.1 Agnes's husband, Matthew, died, leaving her a widow.
- [S936] British History Online - Victoria County History: Victoria County History, A History of the County of Berkshire: Volume 4,
William Page and P.H. Ditchfield (eds),1924 - Pages 384-390 - Richard de Sandford, to whom a third of West Wittenham had been granted as stated above, went on a crusade as a Knight Templar, granting his part of the manor during his absence to his brother Robert. Richard died childless, and his nephew Robert son of Robert seems to have taken possession of this share, which was, however, claimed in 1222 by Hugh de Sandford, grantee of the other third. Hugh claimed as heir of Richard, as his elder brother Thomas and Warin, Thomas's son, had surrendered their title to him. An agreement was made that Robert should hold this land of Hugh and his heirs for the service of 60s. and a rent of 10s. to Littlemore Priory. Hugh thus obtained the overlordship of one-third as well as the tenancy of one-third, and his heirs were returned in 1295 as holding two-thirds of a fee.
Hugh de Sandford of Hook Norton (Oxon.), died about 1233 leaving daughters and co-heirs, Christine widow of William de Sideham and Agnes, and his two-thirds of the knight's fee and manor, or part of the estate, for some centuries descended in two parts. Christine afterwards married John de Plessis (afterwards Earl of Warwick, in right of his second wife), and Agnes, her younger sister, receiving licence in 1234 to marry whom she would, married Matthew Hussey of Harting and Pulborough, Sussex. John de Plessis and Matthew Hussey shared this estate about 1240. - www.british-history.ac.uk.