He died in Warren County OH 4/23/1958. I would try to get his obit and see what it says about Della. I found a marriage for a Della Farmer and Walter Brown in 1929 and then they moved to Charlotte. The obit for Garah may tell you Della's husband's name and who Bettie Jean married. Post onto the Warren County genforum board.
Warren County Genealogical Society 406 Justice Dr. Lebanon, OH 45036