Adapted from Wikipedia, “Alan la Zouche (1205-1270)”

Alain de Porhoet took the name Alan la Zouche when he arrived in England. He was the first of the family to be established in England, and was a younger son of Geoffrey, viscount of Porhoet in Brittany (d. 1141); his elder brother, Eudes de Porhoet, was for a few years Count of Brittany, by marriage. Under Henry II Alain de Porhoet, or Alan la Zouche, established himself in England, and married Adeline de Belmais, sol heiress of the house of Belmais, her inheritance including Tong Castle in Shropshire, Ashby (afterwards called Asby-de-la-Zouch) in Leicestershire, North Molton in Devonshire, and other lands in Cambridgeshire and elsewhere