 A large wave of Jewish immigrants from Eastern Europe in the late 19th and early 20th centuries produced Jewish mobsters such as Max "Kid Twist" Zwerbach, "Big" Jack Zelig, and Vach "Cyclone Louie" Lewis, who competed with and were acknowledged by Italian and Irish gangs.Just as with their Italian counterparts, gangs specializing in extortion began operating in the heavily Jewish neighborhoods of New York's Lower East Side, most prominently the so-called Yiddish Black Hand headed by Jacob Levinsky, Charles "Charlie the Cripple" Litoffsky, and Joseph Toplinsky during the early 20th century.A significant Jewish underworld already existed in New York at the start of the 20th century, with Jewish mobsters conversing in a jargon with Yiddish origins.