Harry
He will call you my love to show how much he loves youRon
Honey or Y/N because he likes to keep things not on the romantic sideDraco
Babe or princess. He likes to call you babe when your around others because he like to let them know you his. And princess because he loves to let you know how special you are.Neville
Sweetie. He will call you this all the time. Sometimes he uses Y/N but not all the time maybe when he's hungry