Hart married Catherine Littleton on 23 Apr 1753 in Lanlivery, Cornwall, England. Catherine (daughter of Thomas Littleton and Ann Hick) was born about 1732; was christened on 29 Feb 1732 in Lanlivery, Cornwall, England; died after 1756. [Group Sheet]

1. Catherine Udy was born about 1756; was christened on 13 Apr 1756 in Luxulyan, Cornwall, England; died on 18 Apr 1824 in St. Breock, Cornwall, England; was buried on 21 Apr 1824 in St. Breock's, St. Breock, Cornwall, England.