Parents of Jacob Hiser were John Hiser (born 1759 in Philadelphia, PA; died 5 March 1839 in Barren County, KY). They are buried in Hiser Cemetery in Metcalf, Kentucky.
Sources:
Department of the Interior, Bureau of Pensions (Birth)
Revolutionary War Pension and Bounty - Land Warrant Application Files, Pension W. 8932.(Death, Marriage)
Will Of John Hiser (Relationship to Jacob Hiser - Son)
Kentucky Pension Roll of 1855 - File #W8932
Guyetta McKee Cluck's book 'Descendants of John Hiser'