This surname ALLIOTT was a baptismal name 'the son of Ailet' which was derived from the old personal name 'Aeselgeat' meaning noble-combat. Early records of the name mention Aliet (without surname) listed in the Domesday Book of 1086. The name was brought into England in the wake of the Norman Invasion of 1066. In 1086 the compilation of the Domesday Book was ordered by William the Conqueror (1027-87), king of England from 1066. He was born in Failaise, the bastard son of Robert, Duke of Normandy, by Arlette, a tanner's daughter. On his father's death in 1035, the nobles accepted him as a duke. When Edward the Confessor, king of England died in 1066, William invaded England that Autumn, on 14th October, 1066 killing Harold (who had become King). English government under William assumed a more feudal aspect, the king's tenants-in-chief and all title to land was derived from his grants, and the Domesday Book contains details of the land settlements, and the names of the owners of such. Galfridus filius Ailgheiti was documented in the year 1176, County Essex. Walter Aliot, 1279, County Cornwall. As early as the year 1100, it was quite common for English people to give French names to their children, and the earliest instances are found among the upper classes, both the clergy and the patrician families. The Norman-French names used were generally the names most commonly used by the Normans, who had introduced them into England during the Norman Invasion of William the Conqueror in 1066. The rise of surnames, according to the accepted theory, was due to the Norman Conquest of 1066 when Old English personal-names were rapidly superseded by the new christian names introduced by the Normans. Of these, only a few were really popular and in the 12th century this scarcity of christian names led to the increasing use of surnames to distinguish the numerous individuals of the same name. Some Normans had hereditary surnames before they came to England, but there is evidence that surnames would have developed in England even had there been no Norman Conquest. The development of the feudal system made it essential that the king should know exactly what service each person owed. Payments to and by the exchequer required that debtors and creditors should be particularized, and it became official that each individual acquired exact identification.