Hi Liz, First some other Darby info that I found; the Lowery/Perham family tree which contains an Eugene Darby b. 1901, Alva, OK and died 1937, Los Angeles, CA. I've asked lynnbob61 to contact you if she has any other info about Eugene.
In 1930 a Gene C. Darby was living in Los Angeles with his sister, Ruby Harrison and her family. Gene Maddolene was not listed.
I did find the 1930 Census of Columbus, Franklin Co., OH which lists Edith M. Henderson, her husband Chester and Marylin E. Darby, step-dau.
Have you checked Franklin Co., OH to see if Gene Maddolene/Marylin died there?
I found an Edith M. Henderson b. 26 July 1900, Last Residence=San Antonio, Bexar Co., TX who died 4 Feb 1993. She was assigned her soc. sec. # in Texas before 1951. Source: Social Security Death Index, Ancestry.
Did you look for Gene Maddolene/Marylin's marriage or death in this county?
I did find a Magaline M. Darby, b. 20 April 1919 who in 1968 was living in Pasadena.
Also a Magaline Darby b. 20 April 1919, Last Residence=Pasadena, Los Angeles Co died 4 Sept. 2002 and her last benefit was sent to Pasadena. Her soc. sec. # was assigned in Texas before 1951. Source: Social Security Death Index, Ancestry. Successful Searching!