I would probebly use the letter K because I have many K names on my list.

7 Girls:
Kylie Jade
Karleigh Faith
Kendall Averi
Kara Grace
Kenzi Lynn
Kaydence Hope
Kambrie Joy

10 boys:
Kade Matthew
Kalan Joseph
Kristopher Levi
Kyler Micheal
Kiernan William
Kelton Robert
Kaleb Nathaniel
Kolin Thomas
Karson Brady
Kody James

There ya go.

i would either use C or J, as per family tradition... i think i'll go with C

9 boys:
Corben
Carlin
Casper
Cedric
Caedmon
Caelan
Cairo
Cain
Callum

9 girls:
Celia
Calypso
Coral
Corrina
Cedar
Celeste
Charisma
Cindra
Clover

im working on middle names...

I'm doing Ls and Ms (some of them I'd never use for my own child but I like them)
9 boys:
Lachlan Michael
Lester Miles
Lincoln Matthew
Levi Mathias
Liam Mahon
Lennon Malachi
Luke Maximilian
Layton Marc
Lex Malik
9 girls:
Leonor Marie
Liliana May
Lyra Madeleine
Lara Mathea
Liv Miriam
Lola Michaela
Lucy Megan
Lorelei Maxine
Lindsay Marissa
Now I think I could make some more so I've decided for Cs and Rs:
Cai Rogan
Callum Reed
Connor Reilly
Carter Russel
Christian Robert
Cillian Raphael
Clancy Roman
Coleman Rion
Cyril Ruben
Cecilia Rhea
Cassandra Raine
Cordelia Ramona
Camellia Ruby
Catherine Renee
Cara Rebecca
Claire Roxanne
Christabel Rose
Clementine Robin
Whoa! I took a lot of time but I'm done! It was fun. But I really can't imagine taking care of 18 children!

GIrls
Aubrie
Arianna
Abigail
Allisandra
Alexis
Autumn
Audrey
Avery
Addison
Ava
Alyssa

Boys
Aaden
Austin
Ashton
Alexander
Adam
Aaron
Aric

i figure i should reply to my own post. . .LOL
I'm going with E's

Ella Rose
Emma Katherine
Ellery Diana
Erica Jade & Elisabeth Carleen
Elsa Giavanna
Elyssa Harmony
Evaline Dionne
Elias Nathaniel
Enoch Davidson
Everett Jason
Every Jonas & Eaton Laramie
Evan Isaiah
Ecker Harmon
Esiah Damon
Ean Leonard

im gonna go with L's and J's

Lauren Jessica
Lily Jensyn
Laura Jane
Louise Jaide
Landon Jay
Lana Joy
Lola Jasmine
Linton Joe
Lolley Jordyn
Liam James
Lara Jackie
Lucy Joy-Anne
Lachlan Jai
Lincoln Jack
Lex Jaxson
Lydia Jace
Liegh Jenna

that was fun

Random Chick