Love the idea of an A name to make them all beginning with a different vowel.
Owen, Isla, Eden and…..
Girls
Ada
Alys*, Alis
Ally*
Abby*; Abbi
Amie*, Aime
Anne, Anna, Anya, Anni, Anny
Alia, Alya
Amya
Alma
Aria
Boys
Asa
Aldo*
Abel
Axel
Alan
Amos
Alex*, Alec
Arlo*