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Last name Sajn (Sajn
, Сайн
, ساجن
) , across the world, is a rare family name. The cognomen Sajn is habitual in Slovenia, where it is quite a rare surname, Serbia, and Austria, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Serbia, Slovenia, and Saudi Arabia. More frequently, Sajn is the forename as well as the last name.