The importance of personal names is most obvious in the movie business.
Actors have to choose a unique name so that credits and jobs are given to the correct person. However, this (typically) enforced change of name gives them the opportunity to choose something memorable and cool.
John Wayne (Marion Morrison)
Marilyn Monroe (Norma Jeane Mortenson)
Kirk Douglas (Issur Danielovitch)
Cyd Charisse (Tula Ellice Finklea)
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