The St. Aubyns proudly traced their ancestry back to the Norman Conquest, though they acquired the manor of Clowance, in western Cornwall, only in the late fourteenth century. St. Aubyn’s great-uncle, William, served in four of the Marian Parliaments. His father, Thomas, who owned over 1,000 acres stretching almost from Land’s End to the Devon border, was active in local government.
St. Aubyn was removed from the Cornish bench in about 1625, after only four years of service. As he was currently assessed at £20 for the subsidy he was certainly wealthy enough to have remained a magistrate, but he was not restored even after his father’s death in the following year. Some failure in his performance must therefore be assumed, though malpractice should probably be discounted as he continued to serve in other local offices. He apparently remained neutral in the factional struggles which divided the Cornish gentry in the late 1620s, notwithstanding the alignment of his younger brother, Thomas, and his brother-in-law, John Arundell, with William Coryton* and (Sir) John Eliot*. St. Aubyn refused to compound for knighthood in 1630.
St. Aubyn drew up his will on 1 Dec. 1638, ‘in some indifferent manner and measure of health’, but confident that in the life to come he would receive ‘an incorruptible, immortal, strong and perfect body’. He assigned to each of his five unmarried daughters a £500 dowry, and to his three younger sons £600 in total. A single charitable bequest of £10 to the local parish of Crowan was intended both for church repairs and poor relief. He died in September 1639, and was buried at Crowan. His eldest son, John, sat for Tregony in the Short Parliament, and for St. Ives and the county during the Protectorate.
