The Hancock County Probate Court should have birth records for that time period. Check
http://probate.co.hancock.oh.us/ for an email address.
Or they may be on film at the library. More info is at
http://www.findlaylibrary.org/hist.htm/.
A Norton Markley registered for the WWI draft in Philadelphia, PA on Sept. 12, 1918. He said he was born 15 Jun 1880 but that form did not ask for his birthplace. The clerk wrote Markly but Norton signed it MarklEy.
There is also a Norton Markley in the SSDI with that birthdate. His Social Security application should include his parents' names, etc. but try the court or library first. A copy of Norton's SS-5 (application) costs $27.
Bill