Cognomen Kapulkin (Kapulkin 
, Капулкин 
) , throughout the world, is a very rare surname. The last name Kapulkin is habitual in Lithuania, where it is a rare surname, Israel, and Poland, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Lithuania, Russia, and Poland.
| VARIANT | COUNTRY |
|---|---|
| Kapulkin | United States, Lithuania, Poland, Israel, Canada |
| Капулкин | Russia |
| krzysztof ryszard kapulkin Ph.D. University of Pittsburgh 2014 |
|