I've seen a bunch of people do this and I think it's super cool. Tell me what impression you get from my character's names!
Girls:
Sebeya “Seb” Keswick
Katarina Kaylock
Rosalie "Josie" Lynch
Adeline Keswick
Boys:
Eiffel Keswick
Raymond “Ray” Kaylock
Arthur Keswick
Edmund Blythe
Just throwing my hat into the ring so you can laugh at how ludicrously wrong I am.
Seb: Rebellious and eccentric. Extra for the sake of being extra, but fiercely loyal to her family and friends.
Katarina: Smart and elegant, a little bit bitter, acts older than her age.
Josie: Short, sweet, slightly adorable but can still kick your ass (aka seems like a cinnamon roll but can actually kill you), hates anyone who dares to call her 'Rosie Josie'
Adeline: Not immediately likeable but grows on you overtime. A little prissy, but does what needs to be done. Falls in love easily.
Eiffel: Tall. Talkative (like seriously won't shut up.) He infuriates his siblings but they still love him. (deep deep down)
Ray: Total bro, needs someone more reserved in his life to keep him grounded and stop him from doing impulsive stuff that could get him killed.
Arthur: bold, a tendency to be a little rude (this one is maybe not accurate, I associate Arthur with king arthur y'know? It overpowers my judgement)
Edmund: an intellectual, probably is close friends with Katarina. His friends have tto push him to be brave.
Oh and I know this isn't at all related to what you asked but I'm going to guess who's a couple (in the event that they are all even of dating age, are dating, and aren't all cousins and aren't gay.) Eiffel & Josie, Arthur & Katarina, Adeline & Ray, Seb & Edmund.
For dating, Seb and Edmund are together for a while but break up because Edmund sucks, and Eiffel and Josie begin dating about halfway through the story. Ray and Seb end up dating, and Arthur and Adeline are married. For personalities, you got Eiffel and Josie pretty much dead on, and Seb and Adeline are pretty close too. Now I'm going to have to remember to use "Rosie Josie" somewhere…
I can't believe I even guessed one couple lol.