Last name Biul (Biul 
, Бюль 
) , in the world, is a very rare family name. The cognomen Biul is characteristic of Kazakhstan, where it is a rare surname, Malaysia, where it is a very rare surname, and Mexico. Not in comparison with a country's population, it most frequently occurs in Mexico, Russia, and Kazakhstan. Also, Biul is the forename as well as the last name.