Roster of Confederate Soldiers, 1861-1865, shows:

Todd, A.W. SC 14th Inf. Co.F
Todd, Joseph T. SC 14th Inf. Co.F
Todd, T.L. SC 14th Inf. Co.F

Usually, persons with the same surname serving in the same unit are related; serving in the same company are doubly so.

14th SC Inf Regt organized for the war 09/09/61
Surrenderd at Appomattox CH 04/09/65