 They acquired the manor of Tehidy in the mid-12th century when William Basset married Cecilia, heiress of the House of de Dunstanville.Recorded as 'Tehidin' in the 12th & 13th centuries, its name is derived from the Cornish language 'ti', a house, and a personal name.By 1330, William Basset owned a substantial building but during the Cornish Rebellion of 1497 it was dismantled by rebels led by Richard Pendyne of Pendeen in revenge for the loyalty to the Crown shown by John Basset, then Sheriff of Cornwall.