I am looking for a name that would fall into the categories of rare and bohemian, with a sort of hipster-ish, urban, alternative vibe. I have two daughters, [name_f]Zaza[/name_f] and [name_f]Tilda[/name_f], so something in that vein.
Bumping this up a bit.
[name_f]Zaza[/name_f] and [name_f]Tilda[/name_f] are very cute siblings. Here are some suggestions 
[name_f]Liv[/name_f]
[name_f]Liva[/name_f]
[name_f]Nessa[/name_f]
[name_f]Astra[/name_f]
[name_u]Storm[/name_u]
[name_f]Hattie[/name_f]
[name_u]Sky[/name_u]
[name_f]Lavender[/name_f]
[name_f]Lark[/name_f]
[name_u]Wren[/name_u]
[name_f]Liv[/name_f] is fabulous, like [name_f]Liv[/name_f] Ullmann, pronounced Leev, right?
Ooh I love [name_f]Tilda[/name_f]. [name_m]How[/name_m] about Xanthie?
Please, could you guys give me more ideas? My baby arrives in [name_u]June[/name_u]!
[name_f]Zaza[/name_f], [name_f]Tilda[/name_f] &
[name_f]Monet[/name_f]
[name_f]Saga[/name_f]
[name_f]Lillia[/name_f]
[name_f]Flora[/name_f]/Fleura
[name_u]Echo[/name_u]
[name_f]Lottie[/name_f]
[name_f]Agatha[/name_f]
[name_f]Djuna[/name_f]
[name_f]Junia[/name_f]
[name_f]Thora[/name_f]
[name_u]Romy[/name_u]
Love suggestion of Ness. Nesta, Nessa, and Agnes could be related suggestions.
Others -
Daria* / Adaria
Cleo* / Cleone / Leonie* / Ione
Erin / Elin
Raina / Reigna
Primrose
Vivian / Viva* / Aviva
Lilac
Mamie / Missy / Mila
Beulah / Belle / Bette
Pearl* / Petra / Posy*
Susanna
Chiara [kee-AHR-ah]
Natasha
Maylin
Cilla
Sidonie / Ellery / Elowen*
Giselle / Greer* / Greta / Gretel
Vera / Vashti
Phoebe / Phaedra / Fay*
Noemi*
Mhera [MEER-ah] / Minna
Averil*
Iris* / Iveta / Ismerie
Lilias
Annique / Annet*
Hera / Helene
Ophira*
Kjersti / Kirsten
Janet / Jolene
[name_f]Saga[/name_f] and [name_f]Djuna[/name_f] are fantastic, I also really like [name_f]Junia[/name_f] and [name_f]Posy[/name_f]. L3onie is my [name_f]Zaza[/name_f]'s middle name already.
[name_f]Zaza[/name_f], [name_f]Tilda[/name_f], and…
[name_f]Saffron[/name_f]
[name_f]Sylvie[/name_f]
[name_f]Winnie[/name_f]
[name_f]Hildie[/name_f]
[name_f]Ruthie[/name_f]
[name_f]CoCo[/name_f]
[name_f]Bessie[/name_f]
[name_f]Zelda[/name_f]
[name_u]Nicola[/name_u]
Nightingale
[name_u]Simone[/name_u]
[name_f]Birdie[/name_f]
Cokie
[name_f]Oda[/name_f]
[name_u]Wallace[/name_u]
[name_u]Vega[/name_u]
[name_f]Vera[/name_f]
[name_f]Zaza[/name_f], [name_f]Tilda[/name_f], and:
[name_f]Nola[/name_f]
[name_f]Sosie[/name_f]
[name_f]Bonnie[/name_f]
[name_f]Leni[/name_f]
[name_f]Tess[/name_f]
[name_f]Coco[/name_f]
[name_f]Yvette[/name_f]
[name_f]Hettie[/name_f]
[name_f]Zaza[/name_f] and [name_f]Tilda[/name_f] are darling! Sorry for any repeats…
[name_f]Zaza[/name_f], [name_f]Tilda[/name_f] &
Alba
[name_u]Amal[/name_u]
Asha
Cana
[name_f]Catlin[/name_f]
[name_m]Dante[/name_m]
[name_f]Edie[/name_f]
Elva
Esri/[name_u]Ezri[/name_u]
[name_f]Garnet[/name_f]
[name_f]Gilda[/name_f]
[name_f]Golda[/name_f]/[name_u]Golden[/name_u]
[name_u]Harley[/name_u]
[name_f]Henna[/name_f]
[name_f]Hera[/name_f]
[name_f]Indie[/name_f]
[name_f]Indra[/name_f]
[name_f]Katrin[/name_f]
[name_f]Leia[/name_f]
[name_f]Leni[/name_f]/[name_u]Lennon[/name_u]
[name_f]Libra[/name_f]
[name_f]Lilac[/name_f]
[name_f]Lilou[/name_f]
[name_u]Loki[/name_u]
[name_f]Lumi[/name_f]/Lumen
[name_u]Marley[/name_u]
[name_f]Pansy[/name_f]
[name_f]Raina[/name_f]
[name_f]Senna[/name_f]
[name_u]Sully[/name_u]
[name_f]Tana[/name_f]
[name_f]Tansy[/name_f]
[name_f]Tulip[/name_f]
All the best!
Edited to add Alba, Asha and Elva.
[name_f]Netta[/name_f] , [name_f]Tanis[/name_f], [name_f]Eva[/name_f] or [name_f]Effie[/name_f], Reya, Mist, [name_f]Edith[/name_f], Naila