These two other Company B Thompsons could be Kin.

Leonidas S. Thompson
Enlisted on 9/1/1862 as a Private.
On 9/1/1862 he mustered into "B" Co. AL 51st P Rangers Cavalry
…

Henry B. Thompson
Enlisted on 9/1/1862 as a Captain.
On 9/1/1862 he was commissioned into "B" Co. AL 51st P Rangers Cavalry
Promotions:
* Major
Intra Regimental Company Transfers:
* from company B to Field & Staff
…

John W. Thompson
Enlisted on 9/1/1862 as a Corporal.
On 9/1/1862 he mustered into "B" Co. AL 51st P Rangers Cavalry

Sources used by Historical Data Systems, Inc.:
- Index to Compiled Confederate Military Service Records

………………………………………………………………………

Leonidas S. Thompson, Private, Company B, 51st Alabama (Partisan Rangers), enlisted April 20, 1862 at Montgomery by H. B. Thompson for 3 years, sent to hospital at Tunnel Hill, Ga. September 28,1863, transferred to Company B, Waddell’s Artillery Battalion* March 29, 1864, no further records

* 20th AL Light Artillery Battalion

…..

L. S. Thompson, Private, Company B, 20th Battalion Alabama Light Artillery, enlisted April __, 1864 at Dalton by Capt. Bellamy for the war, receipted for an issue of clothing June 24, 1864, no further records

Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Alabama