Last name Саулиак (Саулиак 
, Sauliak 
, Saulyak 
) , in the entire world, is a rare family name. The surname Саулиак is habitual in Estonia, where it is a rare surname, Portugal, and New Zealand. Measured by absolute frequency, it is the most numerous in Russia, Portugal, and Estonia.
| VARIANT | COUNTRY |
|---|---|
| Саулиак | Russia |
| Sauliak | Ukraine, Estonia, New Zealand |
| Saulyak | Portugal, Russia, Ukraine, Spain |