I think that Snape would have hated having a Potter named after him, and I think Ginny knew that with is probably why she agreed to it. 

This explains it, its the only acceptable reason. 

********

I hope every one had a wonderful christmas morning. In Norway we open presents on christmas eve, so I opened all of my presents yesterday. I got the Hogwarts Library fro my aunts. I was so happy and excited. And I got the HP colouring book! 

Hope you all have a great holiday!