Looking for More Ancestors of William Hogge Dickson of MS

He was b. about 1856 and d. after 1892 in AZ. His father was Alexander Mat who was b. about 1829 in TN and his mother was Sarah. I am curious if her name was Hogge, but I haven't found anything about this. Alexander's father was William Dickson b. about 1808 in TN and his mother was Tabith Chisum b. 5 Jun 1811 in TN. She's descended from William Chisum and Nancy Dillingham.