That you RARELY hear in real life or see on forums like nameberry. I keep seeing [name]Cordelia[/name] and [name]Persephone[/name] [name]EVERY[/name] where, and I really want an extremely uncommon name for my baby…and go!
Not sure where it is, but nameberry has a link to the US social security list for names beyond the top 1000, that’s a good place to start.
If you don’t find any there, maybe try something ethic, or for example an Ancient [name]Rome[/name] name?
I have also read some great uncommon Biblical names, such as [name]Keziah[/name], [name]Jemima[/name], [name]Keturah[/name] and others… Good luck
[name]Palasha[/name]
[name]Thessaly[/name]
[name]Jessamy[/name]
[name]Vashti[/name]
[name]Celestine[/name]
[name]Jerusha[/name]
[name]Mahala[/name]
[name]Basia[/name]
[name]Thalassa[/name]
[name]Leontine[/name]
[name]Delphine[/name]
[name]Vesta[/name]
[name]Renata[/name]
[name]Mariposa[/name]
[name]Sidonia[/name]
[name]Anahi[/name]
[name]Thais[/name]
[name]Demelza[/name]
[name]Lilias[/name]
[name]Evadne[/name]
[name]Calypso[/name]
[name]Livana[/name]
[name]Magali[/name]
[name]Tirzah[/name]
[name]Penina[/name] / [name]Peninah[/name]
[name]Nuria[/name]
[name]Lucienne[/name]
[name]Fairuza[/name]
[name]Peridot[/name]
Livienne
[name]Isabeau[/name]
Leto
Names i’ve rarely heard in real life and hardly ever see on this forum or any other:
[name]Bellamy[/name]
[name]Bellatrix[/name]
[name]Celestina[/name]
[name]Circe[/name]
[name]Cornelia[/name]
[name]Hester[/name]
[name]Isolde[/name]
[name]Tatiana[/name]
[name]Astoria[/name]
[name]Georgette[/name]
[name]Bianca[/name]
[name]Jocelyn[/name]
[name]Evanthe[/name] – ee-van-thee
[name]Xanthe[/name] – zan-thee
[name]Forsythia[/name]
[name]Antoinette[/name]
[name]Sora[/name]
[name]Lavinia[/name]
[name]Valencia[/name]
[name]Shae[/name]
[name]Kimber[/name]
[name]Kiona[/name] – kee-oh-nah
[name]Apollonia[/name]
[name]Aquila[/name]
[name]Ione[/name] – ee-oh-nee
[name]Samara[/name]
[name]Elysia[/name] – eh-lee-shiuh
[name]Cymbeline[/name]
[name]Artemisia[/name]
[name]Yvaine[/name]
[name]Alexane[/name] (just met a girl named this)
[name]Constantina[/name]
[name]Damiana[/name]
[name]Faustina[/name]
Gloriana
[name]Ursula[/name]
Soteria
Etain
[name]Xiomara[/name]
Catori
Megara
Lysandra
[name]Zephyrine[/name]
Friends and children of friends whose names I never hear anywhere:
[name]LaRue[/name]
Alexakai
[name]Fauna[/name]
[name]Demetria[/name]
[name]Morna[/name]
Vitani – vih-tah-nee
[name]Gitana[/name]
Luminitsa
Mircea
Endellion
[name]Parthenia[/name]
Damali
Ashera
There’s a bunch there. [name]Do[/name] you like any?
Gencina
[name]Winola[/name]
Winora
[name]Silvina[/name]
[name]Minette[/name]
[name]Eppie[/name]
Chella
[name]Garlyn[/name]
Monema
[name]Curry[/name]
[name]Raisa[/name]
[name]Brissa[/name]
[name]Sosie[/name]
[name]Cilla[/name]
[name]Milla[/name]
Milligan
[name]Abitha[/name]
[name]Carmel[/name]
Arlyth
Fidellia
[name]Halina[/name]
Ilamay
Lemay
Idessa
[name]Idella[/name]
[name]Lovina[/name]
Lovelia
[name]Nealy[/name]
[name]Tressa[/name]
Rispa
[name]Permelia[/name]
Mystel
Mitta
Lentina
I like pp suggestions of [name]Delphine[/name] and [name]Nealy[/name] (thinking [name]Valley[/name] of the Dolls!) While I feel like I do see [name]Delphine[/name] occasionally on Nameberry, I’d never heard of it before I came on here and I’ve definitely never seen it used [name]IRL[/name].
@alzora RE: [name]Minette[/name], you’re never going to see this as a name because it’s not used for people unless as a nn (usually between lovers though sometimes family), it is used for cats because it means pussycat but it’s also be used to imply cunnilingus (faire minette) which makes it even less usable imo.
Sorry I know I can be critical about names and even say some aren’t usuable but this one is my number 1 completely unusable for a real given name.
I throw some of these out a lot but in case you haven’t heard them
[name]Isaure[/name]
Isoline
Astrée ([name]Astraea[/name])
Ysaline
[name]Eva[/name]ëlle
Théoxène
[name]Velia[/name]
Noëlie
Brisēís
[name]Apolline[/name]
Eugénie
Garance
Pélagie
[name]Eglantine[/name]
Amédée
[name]Amandine[/name]
[name]Josiane[/name]
Roxelane
Ludivine
Roseline
[name]Rose[/name]-[name]Mai[/name]
[name]Esperanza[/name]
[name]Octavie[/name]
Aldonza
Aubane
[name]Perrine[/name]
[name]Marisol[/name]
[name]Acacia[/name]
[name]Andromeda[/name]
[name]Blythe[/name]
[name]Calliope[/name]
[name]Ekaterina[/name]
[name]Famke[/name]
Liat
Liviana
[name]Noor[/name]
[name]Quenby[/name]
[name]Starling[/name]
[name]Zinnia[/name]
[name]Maura[/name]
[name]Audra[/name]
[name]Zandra[/name]
[name]Hollis[/name]
[name]Magdalene[/name]
[name]Corinne[/name]
[name]Coralie[/name]
[name]Henrietta[/name]
[name]Paloma[/name]
I would never use [name]Jemima[/name] d/t the terrible connotations it has. But I like [name]Keturah[/name]. [name]Keturah[/name] is really nice!
I have [name]Augustus[/name] and [name]Julius[/name] on my list in terms of [name]Roman[/name] names.
I like [name]Delphine[/name] and [name]Mariposa[/name] ([name]Butterfly[/name]!). Livienne is very interesting
[name]Isolde[/name] has always be on my list! I love [name]Cornelia[/name], [name]Ione[/name], [name]Artemisia[/name], and [name]Xiomara[/name]!
Yes, I agree with looking at the SSA list. I know one Cordeilia who is in her 20’s (and was named after her grandmother)and no [name]Persephone[/name]'s, but both are cool names. I also think that once you really like a name, you see it everywhere (there is some sort of pyschologial theory on this…when you like/do/went through something this pops up all over the place). I know 2 of my kids do not have first names in the top 1000, but, they are familiar enough names (well, [name]Linus[/name] is 
) that they do sound common enough to most people if that makes sense.
My great grandmothers name was [name]Roxy[/name], I’ve never heard it since other than the clothing line. I like [name]Anais[/name], I’ve definitely never met one!
Betony, [name]Doveva[/name], Everild, [name]Gardenia[/name], [name]Joya[/name], [name]Ondine[/name], Pieta, [name]Thekla[/name], [name]Verbena[/name], Zosime.
I’m mostly the only one who mentions these, [name]Thekla[/name] I don’t even mention.
Here are a few more:
[name]Thisbe[/name]
[name]Anise[/name]
[name]Esmeralda[/name]
[name]Mahalia[/name]
[name]Tosca[/name]
[name]Zillah[/name]
[name]Melora[/name]
[name]Sonora[/name]
[name]Shalom[/name]
I’m seeing [name]Cordelia[/name] and [name]Persephone[/name] everywhere! It is nuts. I will probably use them though. I also like [name]Isadora[/name], [name]Guinevere[/name] and [name]Seraphina[/name] (I see [name]Seraphina[/name] everywhere), as well as [name]Hermione[/name].
I [name]LOVE[/name] [name]Linus[/name]. [name]Linus[/name] and [name]Felix[/name] and [name]Violet[/name] are awesome!
But I do think [name]Persephone[/name] and [name]Cordelia[/name] have gotten to be very popular via web.
[name]Esmeralda[/name] is on my list!
So nice to see other people’s suggestions. I may add some of these intriguing names on my master list. 
Been digging through a name list I have on another naming website, lots of 'em I forgot about. Enjoy!
[name]Ambrosia[/name]
[name]Amina[/name]
[name]Antonia[/name]
[name]Atalanta[/name]
[name]Ayla[/name]
Aysu
[name]Brigitte[/name]
[name]Calypso[/name]
[name]Camilla[/name]
[name]Carmilla[/name]
[name]Celeste[/name]
[name]Coline[/name]
[name]Danika[/name]
[name]Eileen[/name]
[name]Elisa[/name]
[name]Elise[/name]
[name]Elysia[/name]
[name]Esther[/name]
[name]Eurydice[/name]
[name]Fawn[/name]
Fiera
[name]Iseult[/name]/[name]Yseult[/name] (a French variant of [name]Isolde[/name])
[name]Janna[/name]
[name]Joanna[/name]
[name]Jolene[/name]
[name]Katarina[/name]
[name]Kathleen[/name]
[name]Katinka[/name]
[name]Marin[/name]
[name]Marina[/name]
[name]Maris[/name]
[name]Mariska[/name]
Millaray
[name]Mira[/name]
[name]Myfanwy[/name]
[name]Nadia[/name]
[name]Natalya[/name] (this spelling)
[name]Nina[/name]
[name]Oceane[/name] (accent mark over the first E)
[name]Odette[/name]
[name]Raphaela[/name]
[name]Rio[/name]
[name]Rosalind[/name]
[name]Rosanna[/name]
[name]Rosetta[/name]
[name]Sarai[/name]
[name]Solene[/name] (accent mark on first E)
[name]Sonya[/name]
[name]Swanhilde[/name]
[name]Sylvana[/name]
[name]Tatyana[/name] (this spelling)
[name]Ursula[/name]
[name]Viola[/name]
[name]Zelda[/name]
[name]Zella[/name]
[name]Zipporah[/name]/[name]Sephora[/name]
[name]Adlai[/name]
Adonai
[name]Alastair[/name]
[name]Alban[/name]
[name]Aldo[/name]
[name]Alejandro[/name]
[name]Alessandro[/name]
[name]Ambrose[/name]
Armas
[name]Asa[/name]
Aslan
[name]Aurelio[/name]
[name]Blair[/name] (also for girls, but slightly prefer on boys)
[name]Cecil[/name]
[name]Cyril[/name]/[name]Cyryl[/name]
[name]Damien[/name]
[name]Damon[/name]
[name]Darius[/name]
[name]Donovan[/name]
[name]Elias[/name]
[name]Emrys[/name]
[name]Endymion[/name]
[name]Erik[/name]
Faris
Firdaus
[name]Flannery[/name]
[name]Jarek[/name] (yah-rek)
[name]Jareth[/name] (yes, from Labyrinth)
[name]Juste[/name] (yoost)
[name]Kent[/name] (my father’s name)
[name]Kieran[/name]
[name]Lark[/name] (regardless of what others say, this is a boy’s name to me!)
[name]Massimo[/name]
[name]Phineas[/name]
[name]Phoenix[/name] (prefer on boys)
[name]Raphael[/name]
[name]Tino[/name]
[name]Uriah[/name]
[name]Uriel[/name]
[name]Dacia[/name], [name]Penna[/name], [name]Rialta[/name], Coriander, [name]Cordula[/name], [name]Columba[/name], [name]Coralia[/name]
http://www.ssa.gov/oact/babynames/limits.html