Surname Poshvina (Poshvina 
, Пошвина 
) , all around the world, is a rare cognomen. The family name Poshvina is habitual in Czechia, where it is a rare surname, Russia, and Kazakhstan, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Poshvina | Russia, Czechia |
| Пошвина | Kazakhstan, Russia, Ukraine |