Cognomen קוסמינסקי (Kosminski 
, קוסמינסקי 
, Kosminsky 
) , throughout the world, is a rare surname. The last name קוסמינסקי is characteristic of Poland, where it is a rare surname, Israel, and Czechia. Not in comparison with a country's population, the name is most common in Brazil, Poland, and Germany. Likewise, קוסמינסקי is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kosminski | Brazil, Poland, United Kingdom, United States, Germany |
| קוסמינסקי | Israel |
| Kosminsky | Brazil, Israel, United Kingdom, Mexico, United States |