ANY name that has the word or meaning "son of..." Linguistically, it just doesn't make sense to give this to girls. Sorry, I know this includes popular names like Addison, but the reality is, girls are not "sons of" anyone.
Any name that already has an appropriate feminine version (Charles and Charlotte... do we really need to name girls Charlie when Charlotte is available??? The nn is cute, but for a full, given name, stick with the already-available name for girls).
Re: Names that should STAY Boys Names.
Exactly!