Claim: Gong Yoo is best known by his pseudonym Gong Yoo.
Evidence: Gong Ji-chul -LRB- ; born July 10 , 1979 -RRB- , better known by his stage name Gong Yoo , is a South Korean actor.
A stage name , also called a screen name , is a pseudonym used by performers and entertainers such as actors , comedians , and musicians.