Thank you very much for your reply. The abundance of Dorothys has also confounded me. This Dorothy should be in the 1930 and 1940 US Censuses as living in Pasadena. By the mid-1940s, she is living in Altadena and is known to be widowed from husband J.J. Green. The couple may have lived in Pasadena in the 1920s, but this is speculative.
Many, many thanks for any information you can provide. I do appreciate your taking one last look.