Kosak Family History
Kosak Name Meaning
Polish; Sorbian (also Kósak); Czech and Slovak (Kosák): variant or derivative of Kos or Kós ‘blackbird’ (Lower Sorbian kósak Upper Sorbian kosak) and Kosa ‘scythe’. The Sorbian surnames are found mainly in Germanized forms especially Kossack while the surname Kosak itself is usually a Germanized form of Kozak (see also 5 below). Czech (Košák): nickname or occupational name from košák ‘beehive made of twigs’. Slovenian (Košak): nickname from koščak ‘kind of nut tree with very hard nuts’ also ‘strong vigorous steady man’ a word ultimately derived from kost ‘bone’ and thus probably also applied to a bony man. Compare Koschak . Croatian (Košak): nickname or occupational name from košak ‘basket’. Germanized form of Polish Sorbian Jewish and Slovenian Kozak or Kózak Czech Slovak and Hungarian Kozák. Compare Kosack see also 1 above.
Source: Dictionary of American Family Names 2nd edition, 2022