People can judge so much just from a name.....
If your dd grows up to be Beryl - the outlandish, artistic, confident, beautiful girl that everybody flocks around, then she's probably going to love the fact that you gave her such an 'unusual' name.
However, if she grows up to be - bookish, introvert, and terribly shy, Beryl may not be loving her name quite so much.
I gave my daughter a less popular name, which I still think is lovely and she's 3 now (however it either gets the reaction 'that's a really beautiful name' or deadly silence) and it's not that unusual tbh . I was aware that I was marking her out - slightly - from the rest by doing it, not always a bad thing for females though IMO and I did have to consider what it would sound like should she decide to become Prime Minister one day!!!
The other important factor is does it go with your surname? If you have a very interesting sounding surname then it could work, but if your name is 'Jones' or 'Brown' say, then it sounds less romantic/evocative.
Ultimately the choice is yours though, just be sure you're doing it for the right reasons. Pregnancy can do funny things to the old grey matter (or it did to mine anyway!)
Anyway, it's not the end of the world, she can always change it if she doesn't like it.