I ran across an old file that has a little info in it on her. Ruby Sapp, m. marion eugene knerr about 1975 in Pinellas County, Fl.
Ruby b. July28, 1910 d. May 1977, clearwater, Pinellas Co., FL. Cause of her death: cancer

have you tried getting a copy of her death certificate? Sometimes there is family information on it. Try the Pinellas County, Fl court records or the Florida Bureau of Vital Statistics in Jacksonville, FL.for copies.