Shestak (Шестак) is a Russian and a Ukrainian surname derived from the nickname shestak meaning "sixth child" or from the name of the coin (Belarusian: шастак, Polish: szóstak, Russian: шостак) denotes a six groschen, originally issued in the Grand Duchy of Lithuania, as well as an English transcription of the Czech surname "Šesták". Notable people with the name include:
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