Last name Mastykov (Mastykov 
, Мастыков 
) , across the world, is a very rare family name. The family name Mastykov is habitual in Belarus, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Mastykov | Belarus |
| Мастыков | Belarus, Kazakhstan, Russia |