I'm complitely in love with this name. It sounds and looks gorgeous, it's got a great astrological backround, and the meaning is about as wonderful as it could get. I think the name
Bellatrix would belong to a intelligent, determined person who is both strong and beautiful (just like the meaning says - a female warrior). IMO, it's one of the most beautiful names in the world.
I'd use
Bellatrix as a first name anytime, but I don't like the mn
Grace. I think it sounds too "nice" and too overused to be combined with the name
Bellatrix. I do like the combo
Maeve Lysandra, though - it matches with the name
Bellatrix.