The family derived its surname from the
manor of Trevelyan in the parish of
St Veep,
Cornwall, situated in the ancient
hundred of West Wivel, called
Trewellen in the
Domesday Book of 1086, and shown in the British Ordnance Survey map of 1890 as located about one mile east of Penpoll. A different manor named
Trevelien in 1086 (now named Trevillyn) is in the adjacent
hundred of Powder. The
Trevilian, later
Trevelyan Baronetcy, of
Nettlecombe in the County of
Somerset, was created in the Baronetage of England on 24 January 1662 for George Trevilian. • The 1st Baronet was the son of George Trevilian, a member of the Somerset gentry and a supporter of the Royalist cause in the
Civil War. • The 2nd Baronet sat as a
Member of Parliament for
Somerset and for
Minehead. He changed the spelling of the family surname to Trevelyan. • The 4th Baronet was a Member of Parliament for
Newcastle-upon-Tyne and for Somerset. • The 8th Baronet served as
High Sheriff of
Cornwall for 1906-7. • As of 28 February 2014 the present Baronet has not successfully proven his succession and is therefore not on the Official Roll of the Baronetage, with the baronetcy considered dormant since 1976. Prominent members of the senior branch included: The Venerable
George Trevelyan (third son of the 4th Baronet),
Archdeacon of
Taunton in Somerset. His third son Henry Willoughby Trevelyan was a
Major-General in the
British Army. His younger son Sir Ernest John Trevelyan (1850–1929) was a Judge of the High Court of Calcutta, a writer on legal matters and a member of the Oxford Town Council.
Humphrey Trevelyan, Baron Trevelyan, son of the Reverend George Philip Trevelyan, son of the Reverend William Pitt Trevelyan, sixth son of the aforementioned the Venerable George Trevelyan, was a diplomat and author. See below. The
Trevelyan Baronetcy, of Wallington in the County of Northumberland, was created in the Baronetage of the United Kingdom on 13 March 1874 for the civil servant and colonial administrator
Sir Charles Trevelyan, 1st Baronet. The estate of Wallington was inherited by Sir George Trevelyan, 3rd Baronet (1707–1768) from his wife Julia Calverley, daughter of Sir Walter Calverley, 1st Baronet, and his wife Julia Blackett, heiress of Wallington Castle, rebuilt by the Blacketts in the 1689s, who purchased it from the Fenwick family. The family seat is
Wallington Hall, near
Cambo in
Northumberland. • The 1st Baronet was the son of the aforementioned Venerable George Trevelyan, third son of the fourth Baronet of the 1662 creation (see above). • The 2nd Baronet, George Otto Trevelyan, was a prominent historian and
Liberal politician. •
R. C. Trevelyan, second son of the 2nd Baronet, was a poet and dramatist. His son
Julian Trevelyan was a painter. •
G. M. Trevelyan, third son of the 2nd Baronet, was a distinguished historian.
Trevelyan College, Durham is named after G. M. Trevelyan, and derives its coat of arms from that of the Trevelyan family. • The 3rd Baronet, Charles Phillips Trevelyan, was a Liberal, and later
Labour politician. • The 4th Baronet, George Lowthian Trevelyan, was a teacher, craftsman in wood and
New Age thinker. The release of historical records has shown that much of the wealth of the family derived from the holding of slaves in Grenada. In 2023, at least 42 members of the Trevelyan family signed a formal apology to victims of slavery, and donated a fund to pay voluntary
reparations. ==Trevilian, later Trevelyan baronets, of Nettlecombe (1662)==