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Last name Sidorski (Sidorski , Сидорский , Сідорскі ) , worldwide, is a rare cognomen. The surname Sidorski is habitual in Belarus, where it is quite a rare surname, Poland, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, the name is most common in Russia, Poland, and the United States. Also, Sidorski is the forename as well as the last name.