I apologise in advance that this became a lengthy ramble
[name_f]Arabella[/name_f]
[name_f]Arabella[/name_f] is gorgeous - elegant and regal, but also sweet and sassy - and [name_f]Arabella[/name_f] [name_f]Lilac[/name_f] [name_f]Jane[/name_f] has such a cosy feel!
I think it goes well stylistically with your set - especially with [name_f]Evangeline[/name_f], [name_f]Vera[/name_f], [name_f]Adele[/name_f], and [name_f]Isobel[/name_f]. That said, I do feel that only some could work together in one set, if that makes sense?
So, these would work for me:
[name_f]Arabella[/name_f] and [name_f]Adele[/name_f]
[name_f]Arabella[/name_f], [name_f]Evangeline[/name_f], and [name_f]Isobel[/name_f]
[name_f]Isobel[/name_f], [name_f]Vera[/name_f], and [name_f]Arabella[/name_f]
[name_f]Isobel[/name_f] and [name_f]Arabella[/name_f] (matchy but kind of liking it here 
and with nn [name_m]Ari[/name_m], it doesn’t bother me too much)
[name_f]Adele[/name_f], [name_f]Evangeline[/name_f] and [name_f]Arabella[/name_f]
[name_f]Vera[/name_f], [name_f]Adele[/name_f] and [name_f]Arabella[/name_f]
[name_f]Arabella[/name_f] and [name_f]Evangeline[/name_f]
However, these ones wouldn’t:
[name_f]Isobel[/name_f], [name_f]Adele[/name_f], and [name_f]Arabella[/name_f] (I think [name_f]Arabella[/name_f] feels like [name_f]Adele[/name_f] and [name_f]Isobel[/name_f] blended)
[name_f]Isobel[/name_f], [name_f]Arabella[/name_f] and [name_f]Claire[/name_f] / [name_f]Adele[/name_f], [name_f]Arabella[/name_f] and [name_f]Claire[/name_f] / [name_f]Adele[/name_f], [name_f]Isobel[/name_f], [name_f]Arabella[/name_f] and [name_f]Claire[/name_f] (Claire loses any sparkle for me)
And I think that might be what gives me pause over [name_f]Arabella[/name_f] as the one is that I struggle with her in am actual sibset with your top two - and with a name I associate heavily with your list?
Still, I guess it depends on whether you want to imagine each name on your list as a sister to all the other names - because if not, then [name_f]Arabella[/name_f] [name_f]Lilac[/name_f] [name_f]Jane[/name_f] is an absolute delight (and probably my fave option out of the three)
[name_f]Aurora[/name_f]
Sparkling, meaningful, and strong - [name_f]Aurora[/name_f] is one of those that, like [name_f]Isobel[/name_f], manages to maintain its magic regardless of popularity, that has multiple associations without feeling too tied to any of them, and is pleasing to look at.
And I suppose - if you go for [name_f]Aurora[/name_f] ‘Ari’, it gives you the opportunity to really focus on finding a combo for sweet [name_f]Aurora[/name_f] that feels right.
I think [name_f]Aurora[/name_f] works on your list!
Some combos:
[name_f]Aurora[/name_f] [name_f]Lily[/name_f] [name_f]Simone[/name_f]
[name_f]Aurora[/name_f] [name_f]Delphine[/name_f] [name_f]Maeve[/name_f]
[name_f]Aurora[/name_f] [name_f]Esme[/name_f] [name_f]Leilani[/name_f]
[name_f]Aurora[/name_f] [name_f]Xanthe[/name_f] [name_f]Tessan[/name_f]
[name_f]Aurora[/name_f] [name_f]Lavender[/name_f] [name_f]Charlotte[/name_f]
[name_f]Aurora[/name_f] [name_f]Pearl[/name_f] [name_f]Hannah[/name_f]
[name_f]Aurora[/name_f] [name_f]Lisette[/name_f] [name_f]Elva[/name_f]
I’ve done two middle combos, but feel free to cut out the second if you want an honor in there
[name_f]Ariane[/name_f]
How is [name_f]Ariane[/name_f] said? A-ree-ah-nee? A-ree-ann? a-ree-ahn?
Aesthetically and style wise, this is an unexpected, elegant choice, familiar yet distinctive, a bit like [name_f]Adele[/name_f], [name_f]Vera[/name_f] and [name_f]Isobel[/name_f] are.
It does, admittedly, remind me a bit of an unpleasant word - but could I get over that, knowing its a [name_f]French[/name_f] name and equally being okay with [name_f]Arianell[/name_f] and [name_f]Ariana[/name_f]? Probably to be honest.
[name_f]Ariane[/name_f] [name_f]Wisteria[/name_f], [name_f]Ariane[/name_f] [name_f]Camellia[/name_f], [name_f]Ariane[/name_f] [name_f]Larkspur[/name_f] and [name_f]Ariane[/name_f] [name_f]Eliza[/name_f] are all lovely!!
Inspired by those:
[name_f]Ariane[/name_f] [name_f]Keziah[/name_f]
[name_f]Ariane[/name_f] [name_f]Cassia[/name_f]
[name_f]Ariane[/name_f] [name_f]Lisbeth[/name_f]
[name_f]Ariane[/name_f] [name_f]Miranda[/name_f]
[name_f]Ariane[/name_f] [name_f]Zelda[/name_f]
[name_f]Ariane[/name_f] [name_f]Linnea[/name_f]
[name_f]Ariane[/name_f] [name_f]Delphinium[/name_f]
[name_f]Ariane[/name_f] [name_f]Celandine[/name_f]
[name_f]Ariane[/name_f] [name_f]Lurlene[/name_f]
[name_f]Ariane[/name_f] [name_f]Lovelace[/name_f]
[name_f]Ariane[/name_f] [name_f]Fenella[/name_f] / [name_f]Ariane[/name_f] [name_f]Fionnuala[/name_f]
[name_f]Ariane[/name_f] [name_f]Moselle[/name_f]