Family name Pyatnitsyna (Pyatnitsyna 
, Пятницына 
) , around the world, is a rare cognomen. The surname Pyatnitsyna is habitual in Russia, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Ukraine, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pyatnitsyna | Russia |
| Пятницына | Kazakhstan, Russia, Ukraine |