Last name Lasaia (Lasaia 
, Ласая 
) , throughout the world, is a rare surname. The family name Lasaia is characteristic of Belarus, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Russia, Belarus, and Ukraine. Very seldom, Lasaia is the forename as well as the last name.