Here's what I don't like about it:
1) It's not a first name. Even if someone is using it as a first name, it doesn't change the fact. I could name my next child "Table" and that wouldn't change it into a table, everyone would just think I was an idiot.
2) Even if it were a name, it doesn't fit with your other daughters who have classic, traditional, beautiful names. I know I joke about this, but I can see poor Bellamy on the therapy couch wondering why mommy and daddy didn't love her as much as her sisters.
3) In general, I wouldn't take any naming advice from someone who names their children "Five" or "Breaker"
4) I definitely think of Bill Bellamy.
What about Bethany? Brittany? Bonnie?