Surname Piyashev (Piyashev 
, Пияшев 
) , all around the world, is a very rare cognomen. The surname Piyashev is characteristic of New Zealand, where it is a very rare surname, Kazakhstan, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Piyashev | New Zealand, Russia |
| Пияшев | Russia, Kazakhstan |