First off, my favourite combinations for both lists are as follows:
Adele Mia
Gemma Ivy*
Abel Montgomery*
Jacoby Nash
I do like these names, but not in the current combo they are in:
Alaina, Elyse, Grace, Amity, Elisabeth, Lily, Everly, Alexa, Evelyn, Juliet and Helena
Morgan, Zachary,Jonah, Gavin, Rhys, Adam...
and Brandt.
Here's a few random suggestions for both Everly & Brandt. (Harley and Talon are NMS at all, but I'll make a list of middle names in a second).
Everly Cate
Everly Gemma
Everly Paige
Everly Georgia
Everly Kristen
Everly Jane
Everly Harper
Everly Noelle
Everly Keira
Everly Prudence
Everly Ruth
Everly Hanna
Everly Grace
Everly Mathilde
Everly Cora
Everly Tessa
Everly Jade
Everly Scarlet
Everly Nora
Everly Cadence
Everly Maude
Everly Hazel
Everly Faye
Everly Patience
Everly Clara
Everly Gwen
Everly Sage
Everly Meredith
Everly June
Everly Piper
Everly Sofia
Everly Florence
Everly Kathryn
Everly Rome
Brandt Joseph
Brandt Michael
Brandt Keegan
Brandt Silas
Brandt Edward
Brandt Joshua
Brandt Matthew
Brandt Elias
Brandt Christopher
Brandt Lionel
Brandt Maxwell
Brandt Timothy
Brandt Samuel
Brandt August
Brandt Lawrence
Brandt Ellis
Brandt Cooper
Brandt Wilson
Brandt Alexander
Brandt Nathaniel
Brandt Evan
Brandt Patrick
Brandt Connor
Brandt Franklin
Brandt Owen
Brandt Miles
Brandt Solomon
Brandt Collin
Brandt Eller
Brandt Wesley
Brandt Arthur
Brandt Levi
Brandt Cassidy
Brandt Spencer
Brandt Nicolas
Brandt Theodore
Brandt Amos
Brandt Dawson
Brandt William
Brandt Logan
Brandt Thomas
Brandt Stephen
Brandt Warner
Brandt Edison