[He can tell without having to say anything, or even feel it across the link, that Aral has followed every nuance of that decision, so he doesn't harp on it. But Gregor does remember that he'd made an assurance to his newest liege-sworn that he'd tell the Vorkosigans to leave him alone about his name, so he verbally steps in.]

He doesn't have one. [He speaks levelly, but the characteristically melancholy cant to his expression deepens just a little.] Those were his words to me. And I know how difficult this will be for both of you, but my recommendation is not to pressure him on it. He has been... indoctrinated into a belief system that counts Vorkosigan as the vilest enemy.

You'll have to be very careful about converting him. [Though, obviously, Gregor does hope that they succeed. It pains him to see anyone else's family with a rift in it, but this one especially.]