Last name ליל (Lil 
, Lill , Lail ) , across the world, is a common cognomen. The cognomen ליל is habitual in Estonia, where it is quite a common surname, Malaysia, and Namibia, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in the United States, Malaysia, and Germany. Likewise, ליל is the forename as well as the last name.