This is super old and I can't believe I never answered it before!
Well back when I first joined, the popular child names were Crucia and Imperio. But in my fics I've named them Bellarosa and Versilius. I think Voldemort would just ditch them though. I think Bella could actually be a decent mother if she wasn't exposed to Voldemort so much. If she let go of him a little I think she might be able to transfer some of that loyalty to her kids,
Honestly i think she could be a good mother if she didnt get ticked off on her kids and well torture them as for voldy he'd prolly kill her first but then again if it all eneded up happy and the kids lived to go to school man the things that could happen i scared to even think killings and such