In the 1940s, it was obligatory for Jews in the performing arts, especially the movies, to hide their Jewishness by using non Jewish names.

Thus:

 Ella  Geisman became June Allyson;

Bette Perske, Lauren Bacall;

Bernie Schwartz, Tony Curtis;

Issur Danielovich, Kirk Douglas;

Frances Rose Schorr, Dinah Shore;

Marion Levy, Paulette Goddard;

Muni Weissenkopf, Paul Muni;

Julie Garfinkel, John Garfield;

Benny Kubelsky, Jack Benny;

Asa Yoelson, Al Jolson;

Charles Bushinsky, Charles Bronson;

Sara Gabor, Zsa Zsa Gabor;

Archibald Leach, Cary Grant;

Chaim Liebovitz, Lorne Green;

David Kaminsky, Danny Kaye;

Dorothy Kaumeyer, Dorothy Lamour;

Mike Orowitz, Michael Landon;

Joseph Levitch, Jerry Lewis;

Leonard Rosenberg, Tony Randall;

Tula Finklea, Cyd Charisse, etc., etc.

The easiest name transition of all, from Jew to Irishman, was made by

 Lee Jacob, to Lee J. Cobb.

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