Last name Биллах (Billah 
, Биллах) , worldwide, is a common family name. The family name Биллах is characteristic of Bangladesh, where it is quite a common surname, Qatar, where it is quite a rare surname, and Brunei. Not in comparison with a country's population, it most frequently occurs in Bangladesh, Indonesia, and Pakistan. Much less frequently, Биллах is the forename as well as the last name.