Sir John IV Arundell (1495–1561), eldest son and heir, known as "Jack of Tilbury", was an Esquire of the Body to King Henry VIII whom he served as Vice-Admiral of the West. He was knighted at the Battle of the Spurs in 1513. In 1523 he achieved notability by the capture of a notorious pirate. He served twice as Sheriff of Cornwall, in 1532 and in 1541. His monumental brass survives in Stratton Church, Cornwall, the place of his burial, the parish church of his secondary seat at Efford, near Bude. John IV Arundell married twice: