Largely originating from the immigration from Eastern Europe uring the late-19th and early 20th centuries, Jewish-American organized crime (sometimes referred to as the Kosher Nostra — a pun on the Italian term Cosa Nostra — Kosher Mafia, the Jewish Mob or the Jewish Mafia) emerged during the later years of the "Gangs of New York" era as Jewish gangs under gang lord Monk Eastman, whose ranks included Max "Kid Twist" Zwerbach, "Big" Jack Zelig and Vach "Cyclone Louie" Lewis, competed with Italian gang leader Paul Kelly's Five Points Gang for control of New York's underworld as the domination of Irish street gangs began to decline.