Hi!
I can only agree with that: brothers and sisters always find themselves absurd surnames. Being the oldest in my family, I personnally take that for true...
I think "the Governess" fitted Tatiana perfectly, and it's even more valuable in my eyes since Alexei and OMA invented it. Who could have known Tatiana's personnality better then them? They were almost always together, afterall, considering the fact that they weren't allowed to meet other kids.
Yeah, maybe it's a little perojative, but it's also funny!