Cognomen סרדיניה (Amadeus 
, סרדיניה 
) , around the world, is quite a rare last name. The last name סרדיניה is characteristic of Serbia, where it is a rare surname, Indonesia, and Guatemala. Measured by absolute frequency, it is commonest in Indonesia, Brazil, and Mexico. More frequently, סרדיניה is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Amadeus | Germany, Tanzania, Spain, Brazil, Indonesia |
| סרדיניה | Israel |