His biological father was named Abraham Enloe, and the Enloe family paid their employee Tom Lincoln to marry their [mestizo=Euro-Amerindian mixed race] servant girl Nancy Hanks and remove her and her then four-year-old child from Rutherford County, NC, to Kentucky.
Tom Lincoln did give himself out to be Abe's father, but soon remarried after the suspiciously early death of Nancy soon after the arrival in Kentucky. Never successful at anything, this Tom Lincoln, a hard and skillful worker when sober, had drinking and gambling problems and never took much interest in Abe.
Lincoln admitted this in his 1856 campaign against Douglas. Among other things that it explains, is his prodigious doing of a man's hard frontier work at the alleged age of 13, and the like. Lawyer at supposed 19, and the like.
The true Lincoln birthplace, regardless of the bogus Federal tourist site in Kentucky, is still known locally as Lincoln Hill today and is located about l mile north of the village of Bostic in Rutherford County, NC, which is some 3 miles NE of Forest City, NC, and some 7 miles east of the county seat at Rutherfordton.
Interestingly enough, this also would imply that Lincoln was at least some one-eighth-to-one-quarter Cherokee Indian by blood, as well as the son of a Southern planter and agricultural pioneer who [by the 1804 era] owned some 100 (black) slaves as well as employing some 200 white and part-Indian free laborers on his three farms.