Walter D'Aincourt

[5] His surname is said to have had its origin in the village of Aincourt in Normandy on the River Seine between Mantes and Magny.

[4] In 1088, after the Rebellion of 1088, Walter bore a royal writ of William II of England ordering the men of William de St-Calais, Bishop of Durham, to return the cattle that they had stolen from rebels during the conflict.

Walter (senior) was known to, and described as a blood relative of, Remigius de Fécamp, Bishop of Lincoln who contributed substantially to William I's conquest of England.

It has been speculated that D'Aincourt's rewards were due not to his contribution to the conquest but to his kinship of Remigius.

Walter and his wife Matilda had many descendants, such as the later members of the House of Neville, including Warwick the Kingmaker.