I have three individuals named Joseph Overholt on my family tree who were born in Canada as follows:
Joseph Overholt born 1815/1816 Clinton Twp., Lincoln Co., Ontario; died 11 Dec 1872 Moulton Twp., Haldimand Co., Ontario; married Barbara ______ died 10 Mar 1885 Moulton Twp.Both are buried in the Mt. Carmel Cemetery, Moulton Twp.
Joseph E. Overholt born 26 Jan 1855 Louth, Lincoln Co., Ontario; married 25 Aug 1886 Oshawa, Ontario Co., Ontario to Helen M. McGilown
Joseph E. Overholt born 1867 Louth Twp., Lincoln Co., Ontario; died 18 Oct 1900 Louth; married 7 Jan 1891 Canboro, Haldimand Co., Ontario to Mary Ellen McIntee born 28 Jun 1872 Moulton, Haldimand Co., Ontario [The IGI shows this Joseph to have been born in Waterloo and died 14 Oct]
If you think one of these Josephs is yours, let me know as I can supply 2-4 more generations.