I always named my MC as Cain. If have last name usually goes with Cain Hunter if it is a game with serious plot, if it is for fap material, Cain Shaft.
Anyway, my bet is that there's gonna be something happened regarding on his mother's background since what I can see from the existing storyline is that she's a talented or an important soldier (or some sort). Maybe they gonna explore that in the future or making the MC obtained a government contract because of the people that used to work with his mother.