William Pitt Trevelyan (1812-1905) (1812–1905) Parents Harriet Neave George Trevelyan Children George Trevelyan Siblings Frances Agnes Trevelyan Edward Otto Trevelyan John Trevelyan George Trevelyan Charles Edward Trevelyan, 1st Baronet Henry Willoughby Trevelyan Harriet Louisa Trevelyan unknown daughter Trevelyan Partners Maria Pleydell-Bouverie