These ideas gave me a great smile! What a way to start my Saturday,

You could make the girls the 4 seasons:
Spring Summer Winter Autumn and then the boy could be Frankie!

Or Greek gods:
Male: Apollo, Hermes, or Zeus
Female: Artemis, Athena, Hera, Artemis

Roman gods:
Male: Jupiter, or Neptune
Female: Juno, Venus, Minerva, Diana, Flora

Astronauts:
Neil, Sally, Bonnie, Kathryn, Marsha, Linda

Wow, you can have fun with this, depending on your hobbies, interests!