Seeking info on Susan Jane McGraw (d/o of Hiram & Sarah Ann Collins) m. George W. Columbia.

Found:

1860 Census>KY>Bracken>Eastern Dist>Augusta PO
George W. Columbia, 25, w, m, farm laborer, b KY
Susan J., 20, w, f, b KY
Hiram, 1, w, m, b KY

1870 Census>KY>Mason>Murphysville
Columbia, George, 31, m, w, laborer, b KY
Martha E., 28, f, w, b KY
Sarah L., 6, f, w, b KY
Hiram, 10, m, w, b KY

Interested in what became of this family. Susan Jane McGraw was sister of my gggrandfather, Anthony Wayne McGraw.

Assume George Columbia in 1860 & 1870 census are the same person. Wife Susan died, George remarried? Is daughter Sarah L. the d/o George & Susan or d/o George & Martha? What became of son Hiram? Found a Hirum Columbia:

1900 Census>KY>Mason>Germantown>Dist 93
Columbia, Hirum, laborer, b Nov 1857, 42, S, b KY, parents b KY, day laborer

Unknown if Hirum in 1900 census is same as Hiram in 1860/1870 census.

Any assistance welcome.
Linda