On that 1850 census where you found Joseph Moore abstracted, Look at the next page and you will find more Moon children.
Also: look for Margaret Kelly betweenRuben Kelly and William Friday Kelly and you will find Margaret Kelly with some Owens children. I don't know exactly how they are related to Margaret. Unless Margaret was William Kelly's mother. she was bn 1790 I think ( quoting from memory) I thought one time she may have been his second wife but I am not sure.William married Susan and then a Margaret Roberts and his 3rd wife was Sarah Jane Moon daughter of John Moon and Mary E Jackson.John married first Nancy Echols who died 1823 and left John Moon with 2 children John and not sure of girls name and he is the one listed with all the children of John and Mary E moon who are with the same children on the 1860 census just before John Moon dies in 1861.
I am guessing that old John and Mary E were in Hoston Co in 1850 disposing of property there.
Never the less i have wondered about the Owens listed with Margaret kelly on the 1850 census. I have a cora kelly who married Robert L (BOB) Williams and my Aunt Ruby Kelly Bunyan thinks Bob's mother was an Owens.
Hope your research is going well, Betty Rackley Taylor