Cognomen Diega (Diega 
) , throughout the world, is quite a rare last name. The family name Diega is characteristic of Aland Islands, where it is quite a common surname, Nicaragua, where it is quite a rare surname, and Mexico. Measured by absolute frequency, it is the most numerous in Mexico, Philippines, and Nicaragua. Also, Diega is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Diega | Nicaragua, Italy, Philippines, Mexico, Venezuela |