We are liking [name_f]Benny[/name_f] for our incoming girl, but want a longer name for formal occasions. We are not a fan of [name_f]Benjamina[/name_f]. Any other suggestions for how we could get to [name_f]Benny[/name_f]?
[name_f]Bernadette[/name_f] came to mind first! 
[name_f]Bernice[/name_f]
[name_f]Bianca[/name_f]
[name_f]Elizabeth[/name_f]
Some of these are a little stretchy, but maybe…
[name_m]Robin[/name_m]
[name_f]Bethany[/name_f]
[name_f]Benedicta[/name_f]
[name_f]Brenna[/name_f]
[name_f]Sabine[/name_f]
[name_m]Bennett[/name_m]
[name_m]Bentley[/name_m]
[name_m]Tobin[/name_m]
[name_f]Bronwyn[/name_f]
[name_f]Belén[/name_f]
Maybe [name_m]Berlin[/name_m], [name_f]Bethan[/name_f], [name_f]Bleuenn[/name_f], [name_m]Bowen[/name_m], [name_m]Brennan[/name_m], [name_f]Bronwen[/name_f], [name_f]Brooklyn[/name_f], or [name_f]Brynn[/name_f]?
[name_f]Benedetta[/name_f], it’s Italian.
[name_f]Love[/name_f] [name_f]Bernadette[/name_f] nn [name_f]Benny[/name_f]! [name_m]Robin[/name_m] is also cute, but a bit more of a stretch.
[name_f]Abena[/name_f]
[name_f]Abeni[/name_f]
[name_f]Albertina[/name_f]
[name_f]Annabelle[/name_f] or [name_f]Annabella[/name_f]
[name_f]Annabeth[/name_f]
[name_f]Belinda[/name_f]
[name_f]Bellona[/name_f]
[name_f]Benedita[/name_f] or [name_f]Benedicte[/name_f]
[name_f]Benicia[/name_f]
[name_f]Benita[/name_f]
Benvinda
[name_f]Berenice[/name_f]
[name_f]Bernarda[/name_f]
Bernardina or [name_f]Bernardine[/name_f]
[name_f]Bethania[/name_f]
[name_m]Betony[/name_m]
[name_f]Blodwen[/name_f]
[name_f]Branwen[/name_f]
[name_f]Brenda[/name_f]
[name_f]Briallen[/name_f]
[name_f]Brienne[/name_f]
[name_f]Rubina[/name_f] / Rubena
[name_f]Verbena[/name_f]
Sorry for inevitable repeats - trying to think outside the box since you’ve had some fab ideas already!
[name_f]Benita[/name_f]
[name_f]Bronwen[/name_f]
[name_f]Bryonie[/name_f] / [name_f]Briony[/name_f]
[name_f]Abilene[/name_f]
[name_f]Sebastienne[/name_f]
Benvon
[name_f]Verbena[/name_f]
Auben
Benceline
Bonibell
[name_f]Sabina[/name_f]
[name_f]Brienne[/name_f] / [name_f]Brienna[/name_f]
Aubrienna
Sorry for repeats!
[name_f]Bernadette[/name_f] (my first thought! )
[name_f]Abeni[/name_f]
[name_f]Benedita[/name_f]
[name_m]Albany[/name_m]
[name_f]Beneta[/name_f]
[name_m]Bentley[/name_m]
[name_f]Bannerjee[/name_f]
[name_f]Arban[/name_f]
[name_f]Ebony[/name_f]
[name_f]Ibane[/name_f]
Habana
[name_f]Paribanou[/name_f]
[name_f]Rubani[/name_f]
[name_f]Zabana[/name_f]
I know of a couple families who have a daughter nicknamed [name_f]Bennie[/name_f]! Their full names are [name_m]Bennet[/name_m] and [name_f]Benedikte[/name_f] (Benedicta). Besides those, maybe Benigna or [name_f]Robena[/name_f] or [name_f]Verbena[/name_f]? Although I would say the “ben” in [name_f]Robena[/name_f] or [name_f]Verbena[/name_f] differently. [name_f]Verbena[/name_f] nn [name_f]Bennie[/name_f] is super fun though! I think that would be my favorite. [name_m]Or[/name_m] you could maybe do a combo nickname for like [name_f]Beatrix[/name_f] [name_f]Fenna[/name_f] or [name_f]Blair[/name_f] [name_f]Vivien[/name_f] nn [name_f]Benny[/name_f]?
Good luck!