Surname Кацнелсон (Кацнелсон 
) , around the world, is an extremely rare cognomen. The last name Кацнелсон is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Кацнелсон | Russia |
Kacnelson, Katcnelson, and Katsnelson