The only William H. Hart I know of, my ggfather married an unknown Martha Ann. They were married around 1857. I have never found what the H. stood for in his name, but I do know he was born in SC, as was his mother Elizabeth. According to census information, they went on to have 10 children. The only child named William he had was William W. Sr. who was born in May 1865, and who went on to marry Mary E. Cook in Maion Co. in 1887.