Robert D'Oyly

Robert D'Oyly (also spelt Robert D'Oyley de Liseaux, Robert Doyley, Robert de Oiley, Robert d'Oilly, Robert D'Oyley and Roberti De Oilgi) was a Norman nobleman who accompanied William the Conqueror on the Norman Conquest, his invasion of England. He died in 1091.

Robert was the son of Walter D'Oyly and elder brother to Nigel D'Oyly. D'Oyly is a Norman French name, from the place name Ouilly of the Calvados département in Normandy. He married Ealdgyth, the daughter of Wigod, the Saxon lord of Wallingford. After Wigod's death, William appointed Robert the lord of Wallingford, and ordered him to fortify Wallingford Castle between 1067 and 1071. It is believed he may have become the third High Sheriff of Berkshire around this time. He was made Baron Hocknorton.

D'Oyly was a sworn brother-in-arms of Roger d'Ivry. The Domesday Book records that by 1086 D'Oyly and d'Ivry held a number of manors either partitioned between the two of them or administered in common.

His brother Nigel's son was Robert Doyley, the founder of Osney Priory, Oxford. He was also an ancestor of Henry D'Oyly, one of the major feudal barons of the Magna Carta.

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