I have a couple of books my grandad gave me when I was a kid which HE got as a kid from his Great Uncle Frank (Benjamin Franklin), who was in the Union Army. Frank's brother, Jeff (Thomas Jefferson), went into the Washington Artillery of New Orleans, which was part of the Confederate Army. My dad's done a lot of research into this and it seems Jeff was paid by another fellow named Zebel to take his place. This was pretty common apparently.
This was a strategic error for it cost him is life at Mayre’s Heights, Fredericksburg, Virginia, on May 3, 1863. There are some well known photographs taken May 6, 1863 showing the wall behind which Uncle Jeff had been firing a few days earlier. He, along with some others, were taken prisoner and shot.
In 1866 the women of Fredericksburg took all the Confederate dead and buried them in the Confederate Cemetery of Fredricksburg and the Confederate Cemetery of Spotsylvania. We don't know in which one Uncle Jeff was buried.
Uncle Frank survived the war and was sent west in 1865 in the Powder River Expedition where his unit engaged some Indians. He died in Jefferson City in 1924. Apparently his uniform and perhaps his sabre are preserved in the state capitol.