Confused about names

So me and my fiancé already have a 2 year old son name Alex JUST ALEX.. and we always said if god blessed us with a girl her name will be Alexis which is cute to me!! Okay guys IM KNOCKED UP WITH A GIRL and I have already told my son his sisters name is Alexis of course he is talking now but not as clear and good as possible but I understand him and he rubs my belly everyday calling the babe Alexis okay so now my fiancé says I like Aaliyah as well let's name her that 🙄🙄🙄🙄 so now I'm still saying Alexis when speaking about her instead of Aaliyah and so does my son WHAT TO DO ILIKE BOTH NAMES ALOT 😢😢😢