Thomas Arundell (died 1433) was an English politician who was MP for Cornwall in 1417, 1419, 1429, and 1435 and High Sheriff of Cornwall 1422âÂÂ1423, 1426âÂÂ1427, 1432âÂÂ1433 and Devon 1437âÂÂ1438. He was the son of John Arundell (1366âÂÂ1435), The Magnificent, of Lanherne, Cornwall. He was also a justice of the peace in the county.