When working with Confederate unit designations, it's import to understand that many commands were known to the War Department under one, but known to officers and men as another. That's in addition to unit designations which changed during the war.
Hobby's 8th Texas Regiment is a fair example. Two other Texas regiments were known in the field as the 8th Texas, Maxey's 9th and Young's 12th Texas Infantry.
You will note that a man named Cornelius Adams from Red River County served in Co. "B", 9th Texas Regiment. He survived the war abd probably remembered the name of his command as the 8th Texas Regiment.
Possibly the name appeared on a register as 'Adams, C. B 8th Texas Regt.' or something like that.