According to his brother, Edward's obituary, Russell John Neff was in the U.S. Marine Corps. I found his birth date on the SS Death Index.
I found his obituary in the Chicago Tribune, dated August 17, 2001. Russell J. Neff, 76, of Boynton Beach, FL and formerly of Park Ridge, IL, passed away on Aug. 14, 2001. Mr. Neff was the retired President of Phoennix Trimming Company of Chicago. He is survived by his wife, Betty Rae; son, Edward A. (Janet) Neff II; two grandchildren, Katie and David Neff, all of East Greenwich, RI. Burial at the 1st Presbyterian Church in Delray Beach, FL. A memorial service to be held there in the Fall. In lieu of flowers, contributions may be made to I Have A Dream Foundation, PO Box 344, Boynton Beach, FL 33435. Lorne & Sons Funeral Home, Delray Beach, FL in charge of arrangements. http://articles.chicagotribune.com/2001-08-17/news/0108170158_1_mr-neff-dream-foundation-boynton-beach, 7/11. I have estimated his birth year.