Changing name after the birth

Baby #4 was born early Wednesday morning. Yay! We are home, birth certificate is done, we announced the name (we don't disclose the name to anyone until after the birth, including to our other kids) all is good.....until....

About 5 minutes ago my husband walked into the room to hand me baby to nurse (I'm on c section recovery) and said "I just don't know about her name. Its a nice name and all....I just don't think it's HER name. I just look at her and can't call her that, I feel like it's wrong."

Ummm excuse me?

I'm really hoping he will get over this (I asked if he had any other suggestions and he didn't) but he never said this about our previous 3 kids so I'm a little taken aback. Just so I'm prepared for the worst in advance....did anyone change their minds after the birth and had the baby's name changed? If so, what's involved?