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Last name Sanko (Sanko , Санко , Санько ) , in the entire world, is quite a common surname. The cognomen Sanko is characteristic of Belarus, where it is quite a common surname, Myanmar, where it is quite a rare surname, and Slovenia. Not in comparison with a country's population, it is commonest in Belarus, Russia, and Myanmar. Also, Sanko is the forename as well as the last name.