I suspect that your grandfather, Martin KERSTETTER b.@1880s who married Minnie GAMBER was the son of another Martin Luther KERSTETTER.This is what I have .. taken from 1880 Delaware twp & 1900 Lewis twp Northumberland Co census.
Martin Luther KERSTETTER b.Mar 1839 ..alive in Lewis twp, NUL Co in 1900. wf .. Katie Ann BALLIETT b.Apr 1839 d. 6 Apr 1911. 1.George W. KERSTETTER b.Nov 1861 .. m?.Cora __... lived Deleware twp,NUL in 1900. .....1. G.Washington KERSTETTER b.Apr 1891 .....2. Carrie H.KERSTETTER b.Nov 1898 2.Isaac S. KERSTETTER b.1863 .. boarder to John G.CATHCART in 1900 Deleware twp,NUL 3.Caroline C.KERSTETTER b.1864 4.Simon P. KERSTETTER b.1866 5.Lizzie B.KERSTETTER b.Apr 1868 6.Ida M.KERSTETTER b.1870 7.Nora A.KERSTETTER b.1873married John Rife SCHAEFFER.>firstname.lastname@example.org 8.Thomas R.KERSTETTER b.1874 9.Mary E.KERSTETTER b.Jan 1872/77 10.Martin L.KERSTETTERb.Apr 1880
Does anyone know which family this Martin Luther KERSTETTER Mar 1839 belongs to???