Shecky Greene was born Fred Sheldon Greenfield. His stage name evolved from Sheldon, which in Yiddish-derived humor became “Shecky”, a catchy, streetwise twist on his given name—something that fit his brash, rapid-fire comedic persona. He eventually made the change legal, embracing “Shecky Greene” both professionally and officially showbiz411.com

In short, his nickname came directly from “Sheldon,” playfully transformed into “Shecky,” and paired with a shortened version of his surname (“Greene”) to form the iconic name he used throughout his legendary career.