I think I have the answer for you concerning the Hogan you questioned in the obit. It is possible the Hogan referred to is his father-in-law. Andrew Jackson second married Martha F. "Mattie" Allen whose father was Hogan Allen.Mattie is my gg-aunt.
I am aware of one child for Mattie and Andrew. Their daughter was named Sarah Ellen "Sallie" Allen, and she married George Howell Keener.
My gg-grandparents, Hogan Allen and Frances Ellen Rushing, went to Arkansas from Anson Co., NC. I question why the Andrew Jackson Allen family ended up in Ashley Co., Arkansas where Hogan Allen's family was located. It could be they were related or not. Interesting nonetheless.