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 | United Kingdom, Germany, Poland, Brazil, United States |
| קוסמינסקי | Israel |
| Kosminsky | United Kingdom, Brazil, Mexico, United States, Israel |