Adding and Subtracting to THESE names? Please help!?

Avalyn or Avalon, Rayna or Rayelle(ray-L), Bethany, Aaliyah or Calea(cuh-lee-uh), Amberly, Jay could be for any name that starts with J! Grey if its for a boy Grace if a girl, Leah/Emma/Emmy/Em/Mia/Malia(muh-leah), Brielle/Elle/Ella/Bree/Abby/Ab/Ellie