My Grandma Becky was the daughter of Jonathan B and Nancy Conner. I am sure of that because of the Civil War documents. Jonathan Riley was her brother.She never spoke of her brother at all (that I know of) - the only sibling we knew of was her half-sister Aunt Annie. (daughter of Nancy Conner and her second husband)
The children of Jonathan and Delpha that I have are: 1. Mary Matilda Lusk m William A Cogdill 2. Eva Jane Lusk m James F Smith 3. Matie Lusk m ? Hogarth 4. Sara Louise Lusk married Arthur Main 5. Louella Lusk b 18 Apr 1890 married a Fuller 6. Maudie Lusk 7. Cora Bell Lusk b 19 Feb 1883 m Norman Thomas McCarver 24 Feb 1905 Harrison Switch, Arkansas // d 11 Sep 1974 - buried Woodland Cemetery, Sandsprings, OK
(Since you say Jonathan R and Delpha had 6 daughters, I'm wondering if Matie is the same person as Mary Matilda.)
I got these names from (I think) Karie and don't know anything more about any of them.