Reaching into my failing memory, I do not think Herron is an 'Irish' name. Otherwise, here is what Booth's says about him.

Herron, Andrew S., Capt. Co. B, 7th La. Inf. En. June 7, 1861, Camp Moore, La. Present on Rolls to Dec., 1861. Roll for Jan. and Feb., 1862, Present or absent not stated. Roll for Jan. and Feb., 1863, Present. Roll for April and May, 1863, Present. Apptd. Judge of Gen. Court Martial, Dept. Gen. Buckner. Record copied from Memorial Hall, New Orleans, La., by the War Dept., Washington, D. C., May, 1903, occupation lawyer, age when enlisted 36, widower, Res. Baton Rouge, La. Promoted _, May, 1863, Col. of Cav. Apptd. on permanent Court Martial.

JIMT