Cognomen Ilaha (Ilaha 
, Илаха 
) , in all the world, is quite a common family name. The last name Ilaha is characteristic of Azerbaijan, where it is quite a common surname, Georgia, where it is quite a rare surname, and France, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Azerbaijan, Georgia, and India. More frequently, Ilaha is the forename as well as the last name.