Hey :3
I’ve been looking for names for myself for a bit and was told to come over here and try. I tend tolike names that feel warm and safe and maybe kinda old, aswell as either gender neutral or masc names. Heres a list of names i like:
im also looking for nicknames for Gemmitarius (other than gem/gemma)
xoxogemmitarius (he/him) 
I definitely see where you’re coming from and I always admire when people have not “safe” name styles. It breaks social barriers in a nice way!
With that in mind as a trans person, I’ll suggest some equally non-traditional word names!
Dirt
Bat (could be a nickname for a traditional name like Sebastian or Bartholomew)
Worm
Newt
Mote (as in a dust mote in a ray of sunlight)
Journey
Rock / Rocky
Chains
Quest
Tomb
Cavern
Skully / Skull
Poltergeist
Cryptid
Boneyard
Cemetery
Zenith
Sleuth
Ruse
Artifact
Ruin
Forest
Boulder
Teeth
Haunt
Chalice
Scrap
Odyssey
Yonder
am I in the right area? or are you looking for potentially more traditional names?
As for nicknames for Gemmitarius:
Gem, Gemma, Tari, and Russ come to mind! (Edit: just saw you’re looking for others besides Gem or Gemma.) In addition to Tari and Russ: Em, Emmy, Ari, Tim.
I wish you the best in your name searching and hope you find one that makes you feel good about yourself and your identity! 
I’ve been waiting for someone to ask for nontraditional word names !!! I love these so much !!
you seem to have a preference for nouns but I’ve included a variety !!
easel
maraschino (nn mars !!)
revolution (nn rev !!)
barrel
bucket (nn bucky i could cry)
solace
solstice
matchstick (sticky is adorable but you could totally go by mat !!)
lifeline
tiger (tiggy !!)
category
millennium
coffee
afternoon
evening
spiderweb (webby !!)
discord
jagged
kilometer
impact
generation
formula
entry
exit
watchtower (!! so cool !!)
rhapsody (also so cool !!)
captain
towel
towers
various (very cool !!)
startle
carpenter (nn options are great !!)
sharp
lingo (just really great vibes here ??)
question
joyride (!!)
rigmarole (rig is so sweet)
calendar (cal)
capricorn
crustacean
ladle
inkwell
dust
tumbleweed (great vibes !!)
heritage
aluminum
magnesium (!!!)
vision (just can’t get any color)
zodiac
saggitarius
bizarre (biz ? bix ? so spunky & cool)
zigzag (I love this one a lot 
)
hypnosis
calamity (!!!)
elixir (SO COOL)
chemical
animal
laboratory
incognito (nito 
)
parapet
ramshackle
rapscallion (diggin it !!)
tidbit
staccato
zeppelin
ziggurat (ziggy !! i love !!)
limerick
and my personal favorite that I’ve campaigned for for the longest time here on namberry:
windowsill
nn windy ?? adorable 
I could cry
as for a nn for gemmitarius, I’ll suggest russ & terry !!
wishing you luck in your search 
Bones
[name_u]Galaxy[/name_u]
[name_u]Forest[/name_u]
[name_u]Brooks[/name_u]
[name_u]Onyx[/name_u]
[name_m]Obsidian[/name_m]
[name_u]Glow[/name_u]
[name_m]Buddy[/name_m]
[name_u]Nebula[/name_u]
Sparky
[name_u]Oleander[/name_u]
[name_u]Pen[/name_u]
[name_u]Frost[/name_u]
Gemmitarius nn…
[name_u]Tari[/name_u]
Ris
Mit
[name_u]Mars[/name_u]
[name_u]Ari[/name_u]
[name_m]Newt[/name_m], Acorn, [name_u]Fable[/name_u], [name_m]Saturn[/name_m], [name_m]Knight[/name_m], [name_u]Slate[/name_u], [name_u]Leaf[/name_u], Ant, [name_u]Fox[/name_u], [name_u]Wolf[/name_u], [name_m]Major[/name_m], [name_u]Chase[/name_u], [name_m]Cash[/name_m], Wince, [name_f]Silence[/name_f], [name_f]Ally[/name_f] (AH-LYE), Lizard, [name_u]Birch[/name_u], [name_u]Spruce[/name_u], [name_u]Minnow[/name_u], Toad, [name_f]Tabby[/name_f], Bash, [name_m]Just[/name_m], Wish, End, Code, Bind, [name_u]Dane[/name_u], Ordain, Vixen, [name_f]Faun[/name_f], [name_f]Trix[/name_f], [name_u]Bo[/name_u]
And for Gemmitarius, [name_u]Tari[/name_u] (Terry), Mity, [name_m]Emmit[/name_m], Rius, [name_u]Rio[/name_u], [name_u]Ari[/name_u] (Airy), [name_m]Arius[/name_m], [name_u]Artie[/name_u] and Tarius
Nicknames: [name_f]Mita[/name_f], [name_u]Tari[/name_u], [name_u]Ari[/name_u], [name_m]Emmit[/name_m]
Abalone
[name_m]Admiral[/name_m]
[name_f]Afternoon[/name_f]
[name_f]Alchemy[/name_f]
Arugula
[name_u]Birch[/name_u]
[name_u]Cerulean[/name_u]
[name_u]Cobalt[/name_u]
[name_m]Crane[/name_m]
[name_u]Crimson[/name_u]
Cypher
[name_f]Eloquence[/name_f]
[name_u]Equinox[/name_u]
[name_f]Ethereal[/name_f]
Eucalyptus
[name_u]Explorer[/name_u]
[name_u]Glacier[/name_u]
[name_m]Malachite[/name_m]
[name_u]Mercury[/name_u]
Miso
[name_f]Monday[/name_f]
[name_u]October[/name_u]
[name_m]Papyrus[/name_m]
Pebble
[name_f]Persimmon[/name_f]
[name_u]Quill[/name_u]
[name_u]Rhythm[/name_u]
[name_u]Rune[/name_u]
[name_u]Slate[/name_u]
[name_u]Solstice[/name_u]
[name_m]Talon[/name_m]
[name_u]Theory[/name_u]
[name_f]Topaz[/name_f]
[name_f]Verbena[/name_f]
Whimsical / [name_f]Whimsy[/name_f]