What lovely names your children have
Thomas, Emily, William and Rachel are in a similar mould, and of them I’d go for Thomas or Rachel as less popular right now.
Molly is Ok, but a nick name really / not very elegant compared to your other names. I don’t personally like Nora or Hazel - quite clunky. Tonya is really horrible and made up sounding (sorry).
Clara
Flora
Beatrice
Caroline
Marianne
Lydia
Louisa
Susannah
Anna
Honor
Verity
Serena
Jane
Clare
Katharine
Genevieve
Stella
Jocelyn
Dorothea nn Dora / Dorey / Dorrie or just Dora
Tessa (as a nn for Esther or Teresa if you want)
Frances
Lois
Francesca
Claudia
Marguerite
Constance nn Connie
Julia
Juliet
Madeleine
Celia
Selina
Edwina, Edith, Esther, Eloise, Estella, Helena, Hera and Adela or Adelaide if you don’t mind the same initials
Patrick
Nathaniel
Nicholas
Ernest
Robert nn Robin or Bobby
Tobias (nn Toby if you want)
Arthur
Edward
Julius
George
Laurence
Luke
Barnabas / Barnaby nn Barney
Silas
Christopher nn Kit
Alistair
Michael
Matthew
Samuel
Gabriel
Dominic
Benedict
John
Miles
Hugh
Rufus
Francis
Joshua
Alexander
Noah
Henry
Jonathan
Sebastian
Joseph
Benjamin
Philip
Rafe
Theodore