I would go for the one that is more commonly used on girls than boys. I’ll list the rankings for your ideas and my own, and I’ll colour code the names - orange is even split (less than 100 spots between the two), pink is mostly female (more than 100 spots), blue is mostly male.
[name_u]Jordan[/name_u] is 222 for a girl, but, [name_u]Jordan[/name_u] ranks at 48th for a boy. ([name_u]Jordyn[/name_u] is 121st for a girl)
[name_u]Kelsey[/name_u] is 267 for a girl, and does not fall within the top 1000 for boys.
[name_u]Hayden[/name_u] is 196 for a girl, but ranks 109th for boys.
[name_u]Taylor[/name_u] is 46th for girls, 346th for boys.
[name_u]Aubrey[/name_u] is 15th for a girl, and does not rank for boys. (However, the Canadian rapper, [name_m]Drake[/name_m] is a male [name_u]Aubrey[/name_u], so that might make the name a bit more unisex in appearance).
Now for my suggestions:
Mainly Girls:
[name_u]Avery[/name_u] (13th for girls, 187th for boys)
[name_u]Hadley[/name_u] (130th for girls, but doesn’t rank for boys)
[name_u]Addison[/name_u] (14th for girls, does not rank in the top 1000 for boys)
[name_u]Teagan[/name_u] (258th for girls, 755th for boys)
[name_u]Quinn[/name_u] (153rd for girls, 321st for boys)
[name_u]Leighton[/name_u] (563rd for girls, does not rank for boys)
[name_u]Harper[/name_u] (24th for girls, 605th for boys)
[name_u]Emerson[/name_u] (244th for girls, 364th for boys)
[name_u]Finley[/name_u] (349th for girls, 547th for boys)
[name_u]Emery[/name_u] (211th for girls, 655th for boys)
[name_u]Peyton[/name_u] (83rd for girls, 153rd for boys) (Although [name_u]Peyton[/name_u] [name_m]Manning[/name_m] makes this a bit more masculine)
[name_u]Reese[/name_u] (128th for girls, 549th for boys)
Mostly Boys:
[name_u]Rowan[/name_u] (301st for boys, 454th for girls)
[name_u]Sawyer[/name_u] (147th for boys, 548th for girls)
[name_u]Elliot[/name_u] (242nd for boys, 862nd for girls)
[name_u]Rory[/name_u] (481st for boys, does not rank for girls)
[name_u]Ellis[/name_u] (612 for boys, does not rank for girls)
[name_u]Blake[/name_u] (71st for boys, 694th for girls)
Evenly split:
[name_u]Riley[/name_u] (47th for girls, 133rd for boys)
[name_u]Darcy[/name_u] (does not rank for either gender)
Hopefully this helped!