Cognomen Zaiontc (Zaiontc 
, Зайонц 
) , all over the world, is a rare last name. The family name Zaiontc is characteristic of Ukraine, where it is a rare surname, Russia, and Brazil, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Zaiontc | Brazil |
| Зайонц | Russia, Ukraine |