Cognomen Viyachev (Viyachev 
) , globally, is a very rare surname. The surname Viyachev is habitual in Bulgaria, where it is a rare surname, and Greece, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Viyachev | Greece, Bulgaria |
| nikolay viyachev Bulgarian cross-country skier, BG (b. 1998) |
|