Surname Kosc (Kosc 
) , throughout the world, is quite a rare last name. The family name Kosc is habitual in Eastern Europe, particularly Slovakia, where it is quite a common surname, Poland, where it is a rare surname, and Romania. Measured by absolute frequency, it most frequently occurs in Slovakia, Poland, and the United States. Also, Kosc is the forename as well as the last name.
| greg kosc American baseball umpire, US (b. 1949) |
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| zbigniew kosc artist, PL (b. 1951) |
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