Yaakov Banai (Hebrew: יעקב בנאי) born Yaakov Tunkel, Alias Mazal (Hebrew: מזל; March 30, 1920 – January 7, 2009) served as the commander of the Lehi movement's combat unit. Banai was a senior Lehi member who masterminded numerous military encounters against British and Arab targets during the Mandate period and the 1947–1949 Palestine war.