Absolute Superman / Batman

Martha Kent

adoptive mother of Clark Kent

Darkseid

DC, Fourth World

Beast Boy

Garfield Logan

Superboy

Kon-El / Conner Kent

Thomas Wayne

father of Bruce Wayne

Batwoman

Kate Kane

Captain Atom

Nathaniel Adam / Cameron Scott

Wonder Girl

Cassie Sandsmark

Martha Wayne

mother of Bruce Wayne

Bizarro

imperfect duplicate of Superman

Mr. Mxyzptlk

Superman villain, Silver Age / Modern Age

Metron

of the New Gods

Uncle Sam

from Quality / DC

Raven

no alternate identity, daughter of Trigon, 1980-2005

Kamandi

Earth A.D., The Last Boy on Earth

Bat-Mite

Calculator

Noah Kuttler

Calculator

Cosmic King

Laevar Bolto, Adult Legion timeline

Saturn Queen

Eve Aries, Adult Legion timeline

Bug

DC, Barney Bonner

Lightning Man

Garth Ranzz: Adult Legion timeline

Cosmic Man

Rokk Krinn: Adult Legion timeline

Saturn Woman

Imra Ardeen-Ranzz: Adult Legion timeline

Nathaniel Adam

DC, Captain Atom

Cir-El

Supergirl (Superman's "daughter")

Toyman

DC, Hiro Okamura

Beauty Blaze

Adult Legion timeline

Chameleon Man

Reep Daggle: Adult Legion timeline

Lightning Lord

Mekt Ranzz, Adult Legion timeline

Skyscraper

Astro City

Brainiac 5

Querl Dox: Adult Legion timeline

Matter-Eater Man

Tenzil Kem: Adult Legion timeline

Dream Woman

Nura Nal-Kallor: Adult Legion timeline

Echo

Myke-4 Astor, Adult Legion timeline