Robin's alter ego name is Dick Grayson. In the DC Comics universe, he was the original Robin before becoming the superhero Nightwing. Later, other characters have also taken on the Robin mantle, but Dick Grayson is the most well-known.
Superstone
Darth Sideous' alter ego is Emperor Paltapine.
He was Thomas A. Anderson and Neo (both the same person, obviously)
Dick Head
Usagi Tsukino .
Peter Parker
I think that was Joker Batman's alter ego is billionaire Bruce Wayne.
Charlie's alter ego is named Hank Evans in the movie Me Myself and Irene.
Sasha Fierce
Bruce Wayne
Sasha Fierce is not Beyonce's real name. Her real name is Beyonce Giselle Knowles. Sasha Fierce is the name of her alter-ego.
Hannah
An alter ego is an alternative identity of a person, or a close and intimate friend.
Batman is Bruce Wayne's alter-ego.
Spaceman Spiff's alter ego is Calvin.
Superstone
Roman is her alter ego