My grandparents were John Henry Jackson Hogan and Nettie Dudding. My great-grandparents were Green & Elmira Hogan. Research was helped by a letter found in Green's Bible(by Sandy Presley)written in 1874 by his brother, Washington. We know that Washington's parents were James E. Hogan and Lucy Haynes. There was also a sister, Elizabeth, who married Jack Dwier and then, John English., but little other is known.
Hopefully, in the future, we will be able to trace even further back as to when the Hogan's came here from Ireland.