Cognomen Jaiña (Jaiña 
) , all around the world, is a very rare family name. The cognomen Jaiña is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname, and Mexico, where it is an extremely rare surname. Very seldom, Jaiña is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jaiña | Chile, Mexico |