Please don't use all caps. Calvin had to register for the draft in WWII. That record could have the first name of his wife. Calvin is also in the 1920 and 1930 census most likely with his parents. He had a SS card and that will tell where he was receiving benefits. His death cert will have more information but it varies by state.
Try a 30 day membership on Ancestry. I did a tree for a friend and with just the name, birth location and date for her father I was able to get a tree back to the Revolution.