That's Who? Who's Who Thursday - Krypto and Friends

Superman's best friend

The Legion of What? 

Yes, really

Krypto 
Art: Colleen Doran / Rick Magyer

Legion of Super-Pets 
Art: Curt Swan / Bob Smith 

That's Who? Who's Who Thursday - Jemm Son of Saturn

Without the Holograms

the solo career has been hell.

Art: Gene Colan / Bob Mcleod 

That's Who? Who's Who Thursday - Speedy

From boy

 To man

Speedy (Golden Age)
Art: Eric Shanower 

Speedy (adult) 
Art: Stan Woch 

That's Who? Who's Who Thursday - Duo Damsel

Triplicate - One = Duo

Duo Damsel aka Triplicate Girl 
Legion of Super-Heroes
Art team: Mary Wilshire / Dick Giordano