Sir George Otto Trevelyan 20 July 1838 – 17 August 1928 was educated at Harrow and Trinity College Cambridge. He spent some years in India in the 1860s, including working as private secretary for his father Sir Charles Edward Trevelyan, and publishing books on British India.
He served as a Liberal Member of Parliament for a number of constituencies – Tynemouth and North Shields (1865-1868), Hawick Burghs (1868-1886) and Glasgow Bridgeton (1887-1897). He also held a number of political offices; Civil Lord of the Admiralty (1868-1870), Parliamentary Secretary to the Admiralty (1880-1882), Chief Secretary for Ireland (1882-1884), Chancellor for the Duchy of Lancaster (1884-1885) and twice serving as Secretary for Scotland (1886, and 1892-1895).
Trevelyan was a radical liberal, supporting expanded suffrage, Irish Home Rule and reform or abolition of the House of Lords, twice resigning his political position in protest at passing bills.
After resigning from public office 1897 he continued working as an author, and his Life and Letters of Lord Macaulay was followed a history of Charles James Fox and a three volume history of the American Revolution.
George married Caroline Philips in 1869, and they had three sons, Charles Philips Trevelyan, Robert Calverley Trevelyan and George Macaulay Trevelyan. George Otto became Baronet of Wallington in 1868, and spent time here and at Welcombe Hall, which was owned by his wife.

Caroline Trevelyan nee Philips c.1847-1928 was politically engaged, acting as President of Morpeth and Wansbeck Women’s Liberal Association and was also involved in the Tynemouth Association. She engaged in philanthropic activities, particularly for the village of Snitterfield, the home of Welcombe Hall, which she inherited in 1890 from her father Robert Needham Philips. She has become known for her watercolour landscapes, which have been exhibited at Wallington Hall.