Thanks for all the information. Certainly didn't expect that provided. Thank you.
I am still at ground zero more than ever. There were a couple possibilities. Since both of his sons grew up in peoria, Illinois in the last 30s, one would think they were still living near there father. There were a couple that were living in Illinois based on the 1920 census. Address shown on the SS-5's Nov/Dec 1936 were not very far apart. My father was 17+ years at the time of applying for the SS-5, so would assume he was still living with his father.
Anyway, thanks for your assistance. It was greatly appreciated.