Danny, it crossed my mind but the problem seems to be the names are not showing up in Kentucky units nor too many showing up in pre war census reports in Mississippi as far as I know. As an example George Hubbard is not listed with any Kentucky unit on Fold 3 not even a G. Hubbard. However there was a George Hubbard as living in Simpson County, Mississippi and listed as born in 1842 in the 1850 census and 1841 in the 1860 census. There was a George Hubbard with Company H of the 1st Mississippi Cavalry but this too seems unlikely especially with no one named Adams as an high officer. I have not checked miscellaneous files however. Morgan only took the best soldiers available with good horses. Anyone not having a good horse was not allowed to go on the raid.
On checking with other Federal POW Records on ancestry with their names it keeps popping up as Adams Cavalry.
With Morgan having over 2,000 raiders these fifty plus names are a very small percentage of his soldiers. I was only personally interested in one soldier who died at Camp Chase who is listed in these physical descriptions and it was spot on but he was with a Kentucky unit and confirmed as such.
I've also considered the possibility of Gettysburg stragglers making their way that far west but that too seems highly unlikely.
I've not spent a large amount of time trying to associate their names with the correct units but it does seem to be a bit of a mystery for now.