Lee. One of the very few names that feels unisex to me.
Some nature names, such as
River,
Sage,
Cedar, Bay, Cove,
Rain,
Storm (although I would say that most floral names feel feminine).
Some nicknames, such as
Sam,
Chris,
Alex,
Mel,
Les,
Lou,
Ash and
Charlie.
Some word names, such as
Indigo,
Journey,
Ocean,
Lake and
Blue.