Wow.. I guess my choice in names needs to be more...appropriate? Lol. I love Jack on a girl because it seems really strong. As far as Casanova, I can see where it should be an ALL BOY's name while Calypso should be an ALL GIRL's name once looking further into the names.
Jack, however, means "God is gracious" and originally came from John just like Makayla came from Michael. Jack COULD be used for a female and it would be a strong name. And even if I do name a girl Jacqueline, everybody would still call her Jackie or Jack.
Zayden- please no more "aiden" names
Bay- prefer on girls
Phoenix- prefer on boys
Zephyr- most will say boy because of the Greek myth but for a more fem association there are Zephyranthes. They're flowers and are sometimes called Zephyr Lilies. So really naming a girl Zephyr is no different than naming her Rose or Violet
Names I consider unisex-
Reagan (more girl)
Spencer (more boy)
Jordan (Jordyn is more girls though)
Shawn/Shaun (Sean is boy)
My favorites for both are Sidney, Ashton, Emerson, Rowan, Jamie, Casey, Cameron, Jordan/Jordyn, Brett, Kendall, and Skyler