Last name Bolyan (Болян 
, Bolyan 
) , throughout the world, is a rare cognomen. The cognomen Bolyan is characteristic of Hungary, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Belarus, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Hungary, Russia, and Kazakhstan. Also, Bolyan is the forename as well as the last name.