Family name Влайко (Vlajko 
, Влайко 
, Vlaiko 
) , all over the world, is a rare surname. The family name Влайко is characteristic of North Macedonia, where it is quite a rare surname, Serbia, where it is a rare surname, and Bulgaria. Measured by absolute frequency, it is the most numerous in Ukraine, Serbia, and Bulgaria. More frequently, Влайко is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vlajko | Greece, North Macedonia, Bosnia and Herzegovina, Serbia, Croatia |
| Влайко | Kazakhstan, Russia, Ukraine, Bulgaria |
| Vlaiko | Russia, Israel |
| Vlayko | Germany |