Cognomen Biliar (Billard 
, Биляр 
, Biliar 
) , in the world, is a common surname. The cognomen Biliar is habitual in France, where it is quite a common surname, Canada, where it is quite a rare surname, and Switzerland. Not in comparison with a country's population, this name is the most popular in France, Canada, and the United States. Much less frequently, Biliar is the forename as well as the last name.