Sir John Trevelyan, 4th Baronet

He married Louisa Marianne Simond, a daughter and co-heiress of Peter Simond of London, a Huguenot merchant. He inherited various Northumbrian estates from his wife's uncle in 1777.^[1] By his wife he had 6 sons and 2 daughters^[1] including:

• Sir John Trevelyan, 5th Baronet (1761–1846), eldest son and heir, father of Sir Walter Calverley Trevelyan, 6th Baronet (1797–1879);
• Walter Trevelyan (1763–1830), 2nd son;
• Venerable George Trevelyan (1765–1827), 3rd son, Rector of Nettlecombe, Canon of Wells and Archdeacon of Taunton, father of:
  • Henry Willoughby Trevelyan (1803–1876), a Major-General in the British Army, father of Sir Ernest John Trevelyan (1850–1929), a Judge of the High Court of Calcutta, a writer on legal matters and a member of the Oxford Town Council.
  • Sir Charles Trevelyan, 1st Baronet (1807–1886) of Wallington Hall, near Cambo in Northumberland, title created in 1874; the 1st Baronet's grandson was the historian George Macaulay Trevelyan (1876–1962)
  • Reverend William Pitt Trevelyan (1812–1905), 6th son, father of Reverend George Philip Trevelyan (1858–1937), father of Humphrey Trevelyan, Baron Trevelyan, a diplomat and author.

He died in April 1828, aged 93.

• Kidd, Charles, Williamson, David (editors). Debrett's Peerage and Baronetage (1990 edition). New York: St Martin's Press, 1990, ^{[page needed]}
• Leigh Rayment's list of baronets