I think
Dana might be one of those names... I'm not entirely sure because it comes from many different cultures. In Persian, the name has been used on both genders for a long time now.
All of the other names I am thinking of that aren't originally male or female are surnames. You can't really call them one or the other.
Names like
Casey,
Avery,
Addison, ect. are equally masculine and feminine.
Also, what about
Dakota? It's a place name originally, so both genders adopted it from there.
This message was edited 2/5/2011, 9:05 PM