Last name Staina (Staina 
, Стаина 
) , throughout the world, is a rare surname. The family name Staina is characteristic of Belarus, where it is a rare surname, Russia, and Kazakhstan, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Russia, Belarus, and Brazil. Much less frequently, Staina is the forename as well as the last name.