Roger O'Connor (1762-1834) was an Irish nationalist and writer, known for the controversies surrounding his life and writings, notably his fanciful history of the Irish people, the Chronicles of Eri. He was the brother of the United Irishman Arthur O'Connor, and the father of the Chartist leader Feargus O'Connor and of Francisco Burdett O'Connor who was to fight in the Spanish American wars of independence.