Well-suited as sister names. I’d be surprised (and pleased, I think) by the discovery of the longer names too!
Hmm... to fit with
Evangeline “
Eva”,
Rosalyn “
Rose” and
Abigail “
Abby” — a longer feminine name on the more common side with an L, some strong consonants, and a sweet, common, shorter nickname. Either a
Christian bent or just “classic”. Not repeating an initial.
Possibilities:
Charlotte “
Lottie”
Caroline “
Carrie” or “Caro”
Cordelia “
Delia” or “
Lia” ?
Matilda “
Tillie” or “
Tilda”
Madeleine or
Madeline “
Maddie” or “Lena”/“Lina”
Penelope “
Penny”
Juliette “
Jules”
Less likely possibilities:
Violet “
Vi”
Marigold “
Mary,
Marie”
Lucille “
Lucy”
Colette — not sure of a nn
Lorelei — not sure of a nn
Felicity — not sure of a nn
Clementine — not sure of a nn
I could also see
Josephine “
Josie” or
Vivienne “
Vivi” working well for them.