In 1172 William de Tresgot owed the service of one and a half knights in the Cotentin. He was succeeded by Robert de Tresgoz, probably his son, who was bailiff of the Cotentin in 1195 and under John, and who held lands in many English counties. Robert adhered to John and lost his lands in Normandy; and in the Registers of Philip Augustus there is the entry "Feodum de Tresgoz quod dominus rex tenet per escaetam debet servicium unius militis et dimidium." By as charter dated at Paris in Nov, 1218 Philip Augustus gave to Miles de Levis the usufruct of the land which Robert de Tregots had possessed at Tregots, Favarches, and St-Romphaire. Favarches is the next commune to Troisgots, and St-Romphaire is close by. There was a castle at Troisgots, described by Gerville.