Cognomen Катцнелсон (Катцнелсон 
) , all around the world, is a very rare family name. The family name Катцнелсон is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Катцнелсон | Russia |
Katcnelson, and Katsnelson