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What does the C.K. in Louis C.K. stand for?

C.K. is a phonetic rendering of Louis C.K.’s real surname, SzĂ©kely. He began styling his name “Louis C.K.” in elementary school and subsequently used it throughout his entertainment career. The name SzĂ©kely is Hungarian. C.K.’s grandfather was a Jewish Hungarian immigrant to Mexico, and the comedian was raised in Mexico City until age seven.