(((((Rain))))) Grandparents are funny about names. While I think you're mother's "logic" is ridiculous my own mother's was just as bad.

When I was pregnant with my daughter, it took forever to pick a name (Elizabeth). I called home all excited (we were in Japan at the time) and my mother's response "oh, you can't name her that, don't you remember crazy Aunt Elizabeth?" No, I did not and it seems that there was no reason to remember her as she died before I was born.

I caved and named her the name I had choosen for my eldest had he been a girl. Stick to your guns!