Popularity rank in the US: Not ranked
Meaning: To bloom; a flower or group of flowers
If specific flower names are too on-the-nose for your tastes, consider Blossom. It's floral and girly but not nearly as common as names like Lily. Your little Blossom might draw comparisons to the hat-loving titular character of the '90s sitcom "Blossom," but that's not a bad thing.