I think I found your Stonewall Alexander. He was the son of Prater and Mary Alexander. He has brothers Archie (Archibald?), Meritt, Willis and a siser named Permelia. They appear on the 1870 Census in Owen County, Kentucky.
In the 1900 and 1920 Census for Hopkins County, Stonewall appears with his wife, Alice and their children.The two you mention are on the 1920 Census.
If you have any questions, feel free to contact me at firstname.lastname@example.org,Virginia in Seattle