Koszarsko is a Polish surname. It is derived from a place name, likely a village or region, related to "koszar," the Polish word for sheepfold or sheep pen. The suffix "-sko" is a common Polish suffix denoting origin or association with a place. Thus, the surname likely originated as a descriptor for someone from or associated with a place where sheep were kept. Surnames of this type are common throughout Poland, originating from a variety of occupations, geographic features, or places. The precise geographic location that spawned this surname is difficult to ascertain without further genealogical research.
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