Trefusis’ forebears were obscure Cornish gentry, remarkable only for the length of their pedigree, which stretched back to at least the early 1200s. During the sixteenth century the family’s fortunes were twice enhanced by marriages to local heiresses, and as a result Trefusis in 1603 inherited four manors and three half-manors, besides the barton six miles south of Truro from which he derived his name. Although he succeeded to this property as a minor, his estates were apparently not subject to wardship, and he progressed uneventfully through Oxford and into local government. Trefusis’ marriage into the godly Treffry family of Fowey in 1611 perhaps reflected his religious outlook, since he and his brother-in-law John Treffry* were later joint dedicatees of a pamphlet by their kinsman, the notable puritan Hugh Peter.
In December 1620 Trefusis was elected to Parliament for Truro. His standing as a local gentleman doubtless assisted his return, but he owned little property in the town itself, and probably relied on his close ties to the borough’s recorder, his kinsman Hugh Boscawen, to secure his place.
During the next decade Trefusis became one of Cornwall’s more active magistrates, particularly in matters relating to security and shipping in Falmouth haven. In 1625 the vice admiral of South Cornwall, (Sir) James Bagg II*, accused him of receiving goods stolen from a merchantman.
Trefusis declined to contribute to the king’s Scottish campaign of 1639, and as the Civil War approached his dissatisfaction with the Caroline regime was fuelled by his religious convictions. In the spring of 1642 he signed a petition to Parliament demanding further reformation of the Church, and as war broke out he described himself and his allies as standing for God’s truth.
Trefusis made his will on 26 May 1647. The bulk of his property descended to his eldet son, but he bequeathed £1,000 to his daughter Amy and sums of £500-£600 to three younger sons. He died between 30 Nov. and 7 Dec. that year, his will being proved on 26 June 1648. His grandson Francis Trefusis sat for Penryn in 1679.
