Last name ساردو (Sardo 
, Sardu 
, Sardou 
) , across the world, is a common cognomen. The family name ساردو is characteristic of Italy, where it is quite a common surname, Portugal, where it is quite a rare surname, and Uruguay. Measured by absolute frequency, the name is most common in Italy, France, and the United States. Much less frequently, ساردو is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sardo | Brazil, Italy, United States, France, Portugal |
| Sardu | Brazil, Italy, Argentina, United States, France |
| Sardou | Brazil, Argentina, United States, France, Algeria |