His paternal grandfather John "atte Hyde de Southdenchworth" (c. 1350 – 1407) was son to William Heygarston de la Hyde and his wife Petronilla. Heygarston died c. 1361. He was himself son to William de la Hyde, owner of two manors known respectively as La Hyde and Longworth-cum-Charney. He had inherited the former from his own father, a senior John de la Hyde. John de la Hyde was son to a Warren de la Hyde, the first member of the family known to have held land in South Denchworth. His paternal grandparents were Sir Richard de la Hyde (d. 1278) and his wife Philippa. Richard was son to Sir Roger de la Hyde. Sir Roger is first mentioned in 1217, commissioned to recruit his family and friends in the service of William Marshal, 1st Earl of Pembroke, Regent for Henry III of England. In 1234, Roger is recorded already holding La Hyde. The ancestry of Roger is recorded in various editions of the Landed Gentry but its accuracy has been questioned. His father Gilbert de la Hyde was reportedly a brother of John of Wallingford, Abbot of St Albans Abbey. His paternal grandfather Ralph de la Hyde (d. 1156) and John de la Hyde (d. 1135) are only known by name. Their original estate "La Hyde de Southcote" seems to have been replaced in time by other family seats. Unknown is when their estate was established. Family tradition in the 17th century placed their origins in the time of Canute the Great, a claim not mentioned in early sources. References Denchworth People from Vale of White Horse (district)