Cognomen Špehar-Rajačić (Špehar-Rajačić 
) , in the entire world, is an extremely rare family name. The cognomen Špehar-Rajačić is characteristic of Southern Europe, particularly Croatia, where it is a rare surname. Parts of the name also exists independently as a last name Špehar, and a last name Rajačić.
| VARIANT | COUNTRY |
|---|---|
| Špehar-Rajačić | Croatia |