In 1840 Nancy Capps (Benjamin's widow) has 2 young males in her househole, one 10-15 and one 5-10.The younger one is Joseph H., still living with Nancy in 1850.The older one fits with the under 5 male in Benjamin's h/h on the 1830 census.Could this be your James Allen?Sounds reasonable to me, but I don't know that it can be proven.Nancy is living near Robert Capps, the one that is purportedly a son of Benjamin.There was another Robert Capps born about 1828 in England that came to Nashville around 1852.
Sally Capps who married John Smith was probably the ex-wife of Benjamin.Sally Smith is living in the h/h of Eliza Harman and family in 1850.
I thought Caleb was a son, based on some family info but now I think the person who passed this on was just guessing.Caleb was born in NC a couple of years before Benjamin married Sally.A bio on Caleb's grandson, Sterling Capps/Caps indicates the father of Caleb was Obediah Capps of NC.
As for the James or William Capps being father to Benjamin, I think that's doubtful.At the time that James and William Capps received grants in Middle Tennessee, Davidson County covered most of the area.The grant to William Capps, a private in the North Carolina Continental Line was for 400 acres in Davidson Co., on the east side of Tennessee River below Mark Creek. I'm not sure where that is located today but it would not be in or near boundaries of the Davidson County in which Benjamin Capps lived and died.A map will show you the path of the Tennessee River at its closest point to Davidson Co.William Capps sold his grant to John Gray Blount and Thomas Blount and the Blount's filed a deed to the land in 1788.William Capps likely never came to Tennessee.The grant to James Capps, a corporal in the North Carolina Continental Line, was for 1000 acres in Davidson County on the south side of the Cumberland River about three miles below the Cross Creeks.This also would have fallen outside the boundaries of Davidson County by the time Benjamin came along.This grant was sold by the heirs of James Capps before March 1786, to William Wicuff and Lardner Clark.James Capps also probably never came to Tennessee.There is no compelling reason to believe that either of these men was the father of Benjamin Capps.