[name]Isabel[/name] nn [name]Issy[/name]: I think [name]Isabel[/name] is pretty, but with the trendiness/massive popularity of [name]Isabella[/name], it feels overused.
[name]Eleanor/name nn [name]Ellie[/name]: I’d go with the frillier [name]Eleanora[/name] option. I think this is really pretty.
[name]Elianna[/name] nn [name]Ellie[/name]: I think [name]Eliana[/name] is pretty, but I think other names on your list work better with [name]Evangelina[/name].
[name]Esmerelda[/name] nn [name]Esme[/name]: I really like [name]Esme[/name]. (Not personally an [name]Esmerelda[/name] fan…)
[name]Seraphina[/name] nn [name]Sera[/name]: I think it’s really pretty, but I wouldn’t use two names ending in -ina.
[name]Francesca[/name] nn [name]Francie[/name], CeCe: I really love this name, and think it’s great with [name]Evangelina[/name].
[name]Emilia[/name] nn [name]Emme[/name], [name]Mia[/name]: [name]Emma[/name] is number one, with [name]Emily[/name] clocking in at #3, so that’s a lot of Emmes in the world. You can get away from the E’s with [name]Amelia[/name].
[name]Julianna[/name] nn [name]Juli[/name]: I do like [name]Juliana[/name], but the [name]Juli[/name] nickname feels way less classy than the name from which it’s derived.
[name]Annabel[/name] nn [name]Anna[/name]: I love [name]Annabel[/name]…
[name]Gabriella[/name] nn [name]Brie[/name]: [name]Gabriella[/name] and [name]Gabrielle[/name] feel dated already, but I do think it works well with [name]Evangelina[/name].
[name]Madeline[/name] nn Madi: This one is too trendy for me, and I think for [name]Evangelina[/name]. For me, nicknames ending in i are really 1980s/trendy/yooneek, along the lines of Beki and [name]Jessi[/name].
My ideas for a boy:
[name]Alexander[/name] nn [name]Alex[/name]: It’s really popular, but I think it’s really handsome. I guess I see [name]Evangelina[/name] with something more exotic. Hmm…
[name]Oliver[/name] nn [name]Ollie[/name]: Ditto. [name]Oliver[/name] is one of my favorites. 
[name]Maxwell[/name] nn [name]Max[/name]: I think other names on your list work better with [name]Evangelina[/name], but I do like [name]Maxwell[/name].
[name]Westley[/name] nn [name]Wes[/name]: Not a [name]Westley[/name] fan, and think you can do better with [name]Evangelina[/name].
[name]Desmond[/name] nn [name]Des[/name]: Not personally a [name]Desmond[/name] fan…
[name]Benjamin[/name] nn [name]Ben[/name]: I can’t see this one with [name]Evangelina[/name], but I do love [name]Benjamin[/name].
[name]Samuel[/name] nn [name]Sam[/name]: Ditto…
[name]Cameron[/name] nn [name]Cam[/name]?: Ditto…
[name]Elliot[/name] (no nn): Ditto…
[name]Ethan[/name] (no nn): Ditto (plus very, very popular…)
[name]Hudson[/name] (no nn) Ditto…
What about:
[name]Arabella[/name]
[name]Aurelia[/name]
[name]Cordelia[/name]
[name]Dahlia[/name]
[name]Flora[/name]
[name]Lilliana[/name]
[name]Mirabella[/name]
[name]Mirabelle[/name]
Raphaella
[name]Simona[/name]/[name]Simone[/name]
[name]Viviana[/name]
[name]Augustin[/name]
[name]Cassius[/name]
[name]Dashiell[/name]
[name]Edward[/name]
[name]Gabriel[/name]
[name]Hugo[/name]
[name]Julian[/name]
[name]Jude[/name]
[name]Milo[/name]
[name]Miles[/name]
[name]Maxfield[/name]
[name]Roman[/name]
[name]Raphael[/name]
[name]Sebastian[/name]
[name]Theodore[/name]
[name]Truman[/name]
[name]Victor[/name]
[name]Vincent[/name]
[name]Xavier[/name]
I think [name]Evangelina[/name] [name]Kate[/name] is really pretty. From your list, I’ll vote for [name]Francesca[/name] with [name]Evangelina[/name], with [name]Eleanora[/name] in second place. (I love [name]Annabel[/name], but I can better see [name]Francesca[/name] or [name]Eleanora[/name] as sisters to [name]Evangelina[/name].)
Good luck!