Unique Gender Neutral Nickname

We have decided we don’t want to find out the gender for baby #2. However, my husband wants to be able to call the baby by a nickname while I’m pregnant.

*We have a daughter already named Zemira (nn Zemi)
*I don’t want the full name to be in the top 1000 if I can help it.

Ideas so far:

[name_m]OZZY[/name_m]: [name_m]Ozias[/name_m]/Oziase
OSSY: [name_m]Osmin[/name_m]/Osmina, [name_m]Oslo[/name_m]/Oslona/Oswen
CC- [name_m]Cecil[/name_m]/[name_f]Cecilia[/name_f]
[name_m]MOSS[/name_m]/MOZZ: [name_m]Moszek[/name_m]/[name_f]Mozelle[/name_f]
[name_m]ARTIE[/name_m]: Artem/[name_u]Artis[/name_u]/[name_u]Artemis[/name_u]/[name_f]Artemesia[/name_f]
[name_m]Cos[/name_m]: Cosim/[name_f]Cosima[/name_f]

[name_m]Vas[/name_m]: [name_u]Vasya[/name_u]

Not sure of nicknames:
[name_m]Anton[/name_m]/[name_f]Antigone[/name_f]
[name_f]Amada[/name_f]/[name_m]Amadeus[/name_m]
Piros/[name_f]Piroska[/name_f]

Or do we just come up with completely separate names and have a cutesy nickname that we will just use as a term of endearment.

Stormaggedon, Dark [name_m]Lord[/name_m] of All

Can call it [name_f]Stormy[/name_f] for short