I like more out of the ordinary names and so far I have Natán, Thanatos and Natalia/Nathalie but can’t really think of anything else. Nate and Nat are off the table because those are his irl nicknames, and I don’t like Nathaniel, other than that I’ll really take any ideas you guys can come up with!
Thank you!! 
Looking at meaning, [name_m]Nathan[/name_m] means “gift of god” and other names with that meaning include [name_m]Matthew[/name_m], Dorothy/Theodora, [name_u]Thaddeus[/name_u], [name_m]Theodore[/name_m], [name_m]Zebedee[/name_m], and all their variations
[name_m]Jonathan[/name_m]
[name_m]Thanos[/name_m] (too Marvel?)
[name_m]Ethan[/name_m]
[name_u]Leviathan[/name_u]
[name_m]Nayan[/name_m]
[name_m]Athanasius[/name_m] / [name_m]Athanasios[/name_m]
[name_m]Thane[/name_m]
[name_m]Jathan[/name_m]
[name_u]Navy[/name_u]
[name_f]Natasha[/name_f]
[name_f]Nathania[/name_f]
[name_f]Athena[/name_f] (it just sounds similar I think?)
[name_f]Nadine[/name_f] / [name_f]Naydeen[/name_f]
[name_f]Natasha[/name_f] would be excellent for a girl! Perhaps [name_m]Ethan[/name_m] for a boy!
Ian has a similar meaning: “God is gracious”
Same goes for John and it’s variants, but that’s a bit of a stretch sound-wise.
[name_u]Noah[/name_u]
[name_f]Nancy[/name_f]
[name_m]Jonathan[/name_m]
[name_f]Anastasia[/name_f]
[name_m]Niven[/name_m]
[name_u]Nev[/name_u]
[name_f]Nevena[/name_f]
Norin
[name_u]North[/name_u]
[name_f]Nenah[/name_f]
[name_f]Nina[/name_f]
[name_f]Nadien[/name_f]
[name_f]Nadine[/name_f]
[name_f]Nanon[/name_f]
[name_f]Noreen[/name_f]
[name_f]Kate[/name_f] (for Nate)
[name_m]Ignate[/name_m]
[name_f]Katelan[/name_f]
[name_u]Tate[/name_u]
[name_f]Tatewin[/name_f]
[name_f]Renata[/name_f]
[name_u]Tatenda[/name_u]
@CaitTheGreat oh I love [name_m]Zebedee[/name_m] and I like some of the variants of those, thank you!
@EagleEyes You can never get too [name_u]Marvel[/name_u] 
I love [name_m]Thane[/name_m] don’t know how I didn’t think of that one! [name_f]Athena[/name_f] is another one I wouldn’t have thought of but works really well!
@snowmaiden I do love [name_f]Natasha[/name_f] 
@may.rose As odd as it id next to my other names I do actually quite like [name_m]Jon[/name_m] (spelled that way)… [name_m]Jathan[/name_m]?
@NameLover2020 Omg I didn’t even think of [name_f]Anastasia[/name_f] and she’s in my top 10!!
@EdgeOfTheMeadow Oooh some interesting ones in here! I like [name_m]Niven[/name_m], [name_u]Nev[/name_u], [name_f]Nevena[/name_f], [name_u]North[/name_u] (love North), [name_m]Ignate[/name_m] and [name_f]Renata[/name_f]!