Sister name for Katherine

We’re adopting and are hopeful to adopt twins. We have two boy names chosen ([name_m]William[/name_m] [name_m]Patrick[/name_m] and [name_m]Henry[/name_m] [name_u]James[/name_u]), and one first name for a girl -[name_f]Katherine[/name_f] “[name_u]Kit[/name_u]” - but need help with a second first name for a girl. [name_f]Beatrix[/name_f] “[name_f]Bea[/name_f]” is a possibility. We have no preference of whether it’s traditionally an English/American name, but would like something timeless that can be shortened to a three or four letter nickname.
Parent names are myself, [name_f]Jenn[/name_f], and husband, [name_m]Matt[/name_m].

[name_f]Katherine[/name_f] and [name_f]Eleanor[/name_f] / [name_u]Elliot[/name_u] / [name_u]Eloise[/name_u] ([name_u]Kit[/name_u] + [name_f]Elle[/name_f])
[name_f]Katherine[/name_f] and [name_f]Victoria[/name_f] ([name_u]Kit[/name_u] + [name_u]Vic[/name_u]/[name_f]Tori[/name_f])
[name_f]Katherine[/name_f] and [name_f]Cordelia[/name_f] ([name_u]Kit[/name_u] + [name_f]Cori[/name_f])
[name_f]Katherine[/name_f] and [name_f]Camilla[/name_f] ([name_u]Kit[/name_u] + [name_u]Cam[/name_u])
[name_f]Katherine[/name_f] and [name_f]Margaret[/name_f] ([name_u]Kit[/name_u] + [name_f]Mary[/name_f])
[name_f]Katherine[/name_f] and [name_f]Rebekah[/name_f] ([name_u]Kit[/name_u] + Bex)
[name_f]Katherine[/name_f] and [name_f]Megan[/name_f] ([name_u]Kit[/name_u] + [name_f]Meg[/name_f])
[name_f]Katherine[/name_f] and [name_f]Kristina[/name_f] ([name_u]Kit[/name_u] + [name_u]Kris[/name_u])
[name_f]Katherine[/name_f] and [name_f]Daphne[/name_f] ([name_u]Kit[/name_u] + Daph)
[name_f]Katherine[/name_f] and [name_f]Theresa[/name_f] ([name_u]Kit[/name_u] + [name_f]Tess[/name_f])
[name_f]Katherine[/name_f] and [name_f]Florence[/name_f] ([name_u]Kit[/name_u] + [name_f]Flo[/name_f])
[name_f]Katherine[/name_f] and [name_f]Genevieve[/name_f] ([name_u]Kit[/name_u] + [name_f]Gen[/name_f] / [name_f]Vivi[/name_f])

I feel like [name_f]Rebekah[/name_f] (Bex) and [name_f]Genevieve[/name_f] ([name_f]Vivi[/name_f]) have similar interesting nn like [name_u]Kit[/name_u] while having interesting lettering like [name_f]Beatrix[/name_f], but I’m not too sure how you guys feel.

[name_f]Margaret[/name_f] nn [name_f]Meg[/name_f]
[name_f]Eleanor[/name_f] nn [name_f]Nora[/name_f] or [name_f]Nell[/name_f]
[name_f]Teresa[/name_f] nn [name_f]Tess[/name_f]
[name_f]Miriam[/name_f] nn [name_f]Mimi[/name_f]
[name_f]Julia[/name_f] nn [name_f]Jill[/name_f]

I think [name_f]Katherine[/name_f] nn [name_u]Kit[/name_u] is a beautiful classic, with lots of brightness and spunk. [name_f]Beatrix[/name_f] can match it in the spunk category, but I’m not sure it’s quite as classic. Some ideas:

[name_f]Charlotte[/name_f] nn [name_u]Charlie[/name_u] or [name_f]Lottie[/name_f] : [name_f]Katherine[/name_f] and [name_f]Charlotte[/name_f] make natural sisters to me, especially as twins. Both names are graceful, long, and classic. [name_m]Even[/name_m] though potential nicknames for [name_f]Charlotte[/name_f] are a bit longer, they’re still spunky and retro just like [name_u]Kit[/name_u].
[name_f]Victoria[/name_f] nn [name_u]Tora[/name_u], [name_f]Tori[/name_f], [name_f]Vi[/name_f], [name_f]Tia[/name_f], or [name_u]Vic[/name_u]: Another elegant classic with spunky, cool nicknames. [name_f]Victoria[/name_f] and [name_f]Katherine[/name_f] are regal and impactful, while [name_u]Vic[/name_u] and [name_u]Kit[/name_u] are spunky and adventurous.
[name_f]Elizabeth[/name_f]/[name_f]Elizabeth[/name_f] nn [name_f]Ellie[/name_f], [name_f]Liz[/name_f], or [name_f]Beth[/name_f] : [name_f]Elizabeth[/name_f] and [name_f]Katherine[/name_f] both have great, distinctive “E” sounds. Both of these names are rich in history and international in appeal.
[name_f]Alice[/name_f] nn [name_f]Aly[/name_f]: This plays up the spunk of [name_u]Kit[/name_u], but is also solid and beautiful.
[name_f]Amelie[/name_f]/[name_f]Amelia[/name_f] nn [name_u]Mel[/name_u], [name_f]Mellie[/name_f], [name_f]Amy[/name_f], or [name_f]Lia[/name_f]: More distinctively British, but with a host of fantastic namesakes across cultures.
[name_f]Rosalind[/name_f]/[name_f]Rosemary[/name_f]/[name_f]Rosalie[/name_f] nn [name_f]Rose[/name_f]: These names are recognizable, but with a twist, just like [name_f]Beatrix[/name_f]. They are also literary, long, and beautiful.
[name_f]Helen[/name_f]/[name_f]Helena[/name_f] nn Hel: These names are bright, beautiful, and feminine, just like [name_f]Katherine[/name_f], but with spunky nicknames.
[name_f]Alexandra[/name_f]/[name_f]Alexandria[/name_f] nn [name_u]Alex[/name_u]: This name is such a stunning choice, like [name_f]Katherine[/name_f], with strength and substance.
[name_u]Marian[/name_u] nn [name_f]Mari[/name_f] or [name_u]Ari[/name_u]: This might just be my favorite for you. It is classic with a twist, like [name_f]Beatrix[/name_f], and also has a lot of history, weight, and strength. [name_f]Katherine[/name_f] and [name_u]Marian[/name_u] subtly share sounds without being too matchy.
[name_f]Julia[/name_f] nn [name_f]Lia[/name_f] or [name_u]Jules[/name_u]: Another beautiful, elegant choice.

I have considered [name_f]Catherine[/name_f] “[name_u]Kit[/name_u]” and [name_f]Beatrice[/name_f] “[name_f]Bea[/name_f]” as sister names. I think they are a perfect match (with [name_f]Beatrice[/name_f] just slightly overruling [name_f]Beatrix[/name_f]). Other ideas:

[name_f]Elizabeth[/name_f] nn Z, [name_f]Bee[/name_f], [name_f]Bet[/name_f]
[name_f]Margaret[/name_f] nn [name_f]Mae[/name_f], [name_f]Margo[/name_f]
[name_f]Josephine[/name_f] nn [name_f]Posy[/name_f]
[name_f]Eleanor[/name_f] nn [name_f]Nell[/name_f]
[name_f]Gwendolyn[/name_f] nn [name_f]Gwen[/name_f]
[name_f]Cecilia[/name_f] nn [name_f]Lia[/name_f]
[name_f]Lucia[/name_f] nn [name_f]Lucy[/name_f]
[name_f]Emmeline[/name_f] nn [name_f]Emme[/name_f]
[name_f]Felicity[/name_f] nn Fliss, Lissy
[name_f]Jessamyn[/name_f] nn [name_u]Jem[/name_u], [name_u]Jess[/name_u]
Madalena nn [name_f]Lena[/name_f]
[name_f]Teresa[/name_f] nn [name_f]Tess[/name_f]