Family name Greyna (Greyna 
) , in the entire world, is an extremely rare surname. The last name Greyna is habitual in Latin America and the Caribbean, particularly Venezuela, where it is a very rare surname. More prevalently, Greyna is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Greyna | South Africa, Brazil, Venezuela, United States, Philippines |