Family name Ciemny (Ciemny 
) , in all the world, is a rare last name. The cognomen Ciemny is habitual in Poland, where it is a rare surname, Canada, where it is a very rare surname, and the United States. Not in comparison with a country's population, this name is the most popular in Poland, the United States, and Germany. Also, Ciemny is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ciemny | Canada, Poland, France, United States, Germany |
| melech ciemny (b. 1910) |
|