Need names for my fictional twin girls

The story takes place in modern time in [name]New[/name] [name]York[/name]. The twins are from a classy and rich family that owns a large condo in Manhattan. I was planning to give the twins each timeless, classic names with an air of elegance and I was hoping to have them start with the same letter, but be distinct enough to tell them apart. I had some ideas starting with C: [name]Caroline[/name], [name]Charlotte[/name], [name]Catherine[/name], and [name]Christina[/name]. Any letter could work though.
Twin #1 is mature and serious when she has to be. She is adventurous and fun and outgoing on her own time. She has thin light brown hair that goes a little past her shoulders. She has a light tan and is about 5’5". She has hazel eyes and is also on the skinny side.
Twin #2 is more shy and quiet than twin #1 but she speaks her mind when she feels it is necessary. She knows what she wants and she will go after it. She has darker hair than twin #1 and it goes down about waist length, though it is usually braided. She has thicker hair than her sister. She has light brown eyes and she also has a light tan. She is a little taller than her sister, around 5’8". She is also on the skinny side.
[name]Both[/name] twins are 17 years old and very independent. They are also dreamers, though twin #2 hides this more than twin #1 does.
Sorry for the long post, any help naming my characters would be greatly appreciated.

I do like [name]Christina[/name] and [name]Charlotte[/name]! I’ll list a few combo possibilities - the first will be for twin one and the second for twin two, though you can switch them around, of course.

[name]Elizabeth[/name] and [name]Eleanor[/name]
[name]Anna[/name] and [name]Alice[/name]
[name]Emma[/name] and [name]Eve[/name]
[name]Julia[/name] and [name]Jane[/name]
[name]Frances[/name] and [name]Florence[/name]
[name]Lucy[/name] and [name]Laura[/name]
[name]Madeline[/name] and [name]Margaret[/name]
[name]Rose[/name] and [name]Ruth[/name]
[name]Sophia[/name] and [name]Susannah[/name]
[name]Virginia[/name] and [name]Victoria[/name]
[name]Lydia[/name] and [name]Louisa[/name]
[name]Celia[/name] and [name]Clara[/name]
[name]Harriet[/name] and [name]Helen[/name]
[name]Violet[/name] and [name]Vivian[/name]
[name]Abigail[/name] and [name]Amelia[/name]

My first thought was [name]Cassandra[/name] and [name]Catherine[/name], nicknames [name]Cassie[/name] and [name]Kitty[/name].
A few more ideas:
[name]Lucia[/name] and [name]Lilliana[/name]
[name]Marcella[/name] and [name]Margaret[/name]
[name]Allegra[/name] and [name]Annabel[/name]
[name]Imogen[/name] and [name]Esme[/name]
[name]Jane[/name] and [name]Rose[/name]
[name]Emilia[/name] and [name]Elise[/name]
[name]Clara[/name] and [name]Georgiana[/name]
[name]Genevieve[/name] and [name]Valentina[/name]
[name]Rosalind[/name] and [name]Romola[/name]

Some of these are matchy and some of them really aren’t. [name]Hope[/name] you find a name that works!

Well, since twin #1 sounds creepishly like me (I’m 18, 5’5", thin/skinny, thin light brown hair to my shoulders, hazel eyes, mature/adventurous), I’d recommend [name]Cecilia[/name]. It’s serious and classic when it has to be, but fun loving and whimsical the rest of the time.

For twin #2, I’d go with something a bit more uncommon. So maybe [name]Camille[/name], [name]Calliope[/name], [name]Cherish[/name], [name]Chastity[/name], [name]Corinne[/name], [name]Coraline[/name], [name]Cosette[/name].

My favorite combo is [name]Cecilia[/name] and [name]Corinne[/name] (Core-een).

[name]Cassandra[/name], definitely, (if your going with the letter C), for # 1

C names for # 2
[name]Chloe[/name]
[name]Christine[/name]
[name]Carolina[/name]

N names for your twins:
#1:
[name]Natalia[/name]
[name]Natalie[/name]
[name]Natasha[/name]

#2
[name]Nell[/name]
[name]Naomi[/name]

D names for your twins:

#1:
[name]Dahlia[/name]
[name]Dannica[/name]
[name]Delaney[/name]

#2:
[name]Della[/name]
[name]Delilah[/name]
[name]Danniella[/name]

(I don’t think that most of these qualify as ‘classic with an air of elegance’, but it’s my best effort for your criteria, so whatever