WordNet sense 1 (English historian and son of Sir George Otto Trevelyan whose works include a social history of England and a biography of Garibaldi (1876-1962)):

George Macaulay Trevelyan

WordNet sense 2 (English historian who wrote a history of the American revolution and a biography of his uncle Lord Macaulay (1838-1928)):

George Otto Trevelyan, Sir George Otto Trevelyan