Coningsby was the orphan child of the younger of the two sons of Lord Monmouth. It was a family famous for its hatreds. The elder son hated his father, and lived at Naples, maintaining no connection either with his parent or his native country. On the other hand, Lord Monmouth hated his younger son, who had married against his consent a woman to whom that son was devoted. Persecuted by his father, he died abroad, and his widow returned to England.