In the 11th century the manor of Le Neubourg was a subsidiary holding of
Roger de Beaumont (d.1094), a principal adviser to
William the Conqueror, and feudal lord of
Beaumont-le-Roger situated 12 km to the SW. He gave the manor to his second son
Henry de Beaumont (c.1048-1119), who was created 1st
Earl of Warwick in 1088 and who adopted for himself and his descendants the surname "de Newburgh", the Anglicised adjectival form of his Norman lordship. The name was
Latinised to
de Novo Burgo, meaning "from the new borough/town". ==Population==