Social Security Death Index says that RaY's SSN was issued in California and Eva's in Minnesota. Do you have a specific location where they lived in either state?
Do you know whether Ray always went by Ray or whether he had a middle initial or was known as Raymond? There was a Raymond W. POWERS of Hennepin Co., MN, in 1930; Ray E. of Marion Co., IA; & Ray of Milwaukee, all born approximately 1913.
Do you have Eva's maiden name or the names of her children?