Ok, quick look, James C Wolfe died in Coshocton Ohio, zip code 48312. I would suggest going to whitepages.com and looking for Wolfe in that zip code or town. Then try some cold calls and see if you luck out.
This is a link to James Wolfe on the 1940 census
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KW2B-VX7 : accessed 23 February 2018), James Wolfe in household of Robert Wolfe, Mount Gilead Village, Gilead Township, Morrow, Ohio, United States; citing enumeration district (ED) 59-11, sheet 13A, line 2, family 303, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 3121.
It lists the names of his siblings. It might help. Good luck!