Family name Piyanin (Piyanin 
, Пиянин 
) , worldwide, is a rare last name. The cognomen Piyanin is characteristic of Russia, where it is a very rare surname, and Kazakhstan. Much less frequently, Piyanin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Piyanin | Canada, Thailand |
| Пиянин | Kazakhstan, Russia |