Last name Polyi (Polyi 
) , in the entire world, is a very rare family name. The last name Polyi is habitual in Hungary, where it is a rare surname, Nicaragua, where it is a very rare surname, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Hungary, the United States, and Mexico. Likewise, Polyi is the forename as well as the last name.