I love [name_u]Keaton[/name_u] and [name_u]Keegan[/name_u] from your boys list! I think my favorite from your girl list is [name_f]Karissa[/name_f], but I like [name_f]Kassandra[/name_f] also.
My favorites are [name_f]Kassandra[/name_f] and [name_u]Keegan[/name_u] and [name_f]Kassandra[/name_f] and [name_u]Kingsley[/name_u]
Congrats on the twins!
I have cousins (siblings) who are [name_u]Kingsley[/name_u] and [name_f]Krystle[/name_f] - so for me they work well together, also I think they pair together the nicest from your options. My second choice would be [name_u]Kingsley[/name_u] and [name_f]Karissa[/name_f].
I love all your girl choices, but I think [name_f]Karissa[/name_f] goes best with the sibset along with [name_u]Keaton[/name_u].
[name_f]Kassandra[/name_f] and [name_f]Krystal[/name_f] are not uncommon/special enough to fit, in my opinion. It’s that way for me, at least. I’ve met plenty of Kassandras and Krystals, but no Kalinas, Karissas or Kendalls. I have met one [name_m]Kaden[/name_m] (such an awesome name!)
I feel like I can’t take [name_u]Kingsley[/name_u] seriously, I think because the “king” part, and [name_u]Keegan[/name_u] is very unpleasing to my ear, so [name_u]Keaton[/name_u] it is! Bias aside, [name_u]Kingsley[/name_u] would sound good with your sibset, but I really do think [name_u]Keaton[/name_u] and [name_f]Karissa[/name_f] sound best as a twin set =]
[name_f]Kassandra[/name_f] and [name_u]Keegan[/name_u] are my definitely my favorite pair. [name_u]Love[/name_u] these together, and with your other kids’ names.
[name_f]Karissa[/name_f] and [name_u]Keaton[/name_u] are in second place, but I think they sound a bit more similar to older siblings, [name_f]Kalina[/name_f] and [name_m]Kaden[/name_m], whereas [name_f]Kassandra[/name_f] and [name_u]Keegan[/name_u] sound more unique.