Family name بالليل (بالليل 
) , throughout the world, is a rare last name. The cognomen بالليل is habitual in Libya, where it is quite a rare surname, Yemen, and Saudi Arabia, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Yemen, Libya, and Sudan. Very seldom, بالليل is the forename as well as the last name.