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Kossakowski
Surname list / From Wikipedia, the free encyclopedia
Kossakowski (Lithuanian: Kosakovskiai)[lower-alpha 1] was an aristocratic family of Mazovian origin.[1][2]
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They were first mentioned in the 13th century and initially settled in Ciechanów County, from where they branched out to the Grand Duchy of Lithuania, Podolia, Volhynia, and Livonia.[1]