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Cognomen Losko (Losko , Лоско , Лосько ) , in the entire world, is a rare family name. The cognomen Losko is habitual in Belarus, where it is quite a rare surname, Estonia, where it is a rare surname, and Poland. In absolute terms, the name is most common in Eastern Europe, particularly Poland, Belarus, and Russia. Also, Losko is the forename as well as the last name.