Cognomen داريوس (Dariusz 
, Darius 
, Darijus 
) , in the world, is a widespread last name. The cognomen داريوس is characteristic of Poland, where it is a prevalent surname, Saint Lucia, where it is quite a common surname, and Romania. In absolute terms, it most frequently occurs in Poland, Indonesia, and Romania. Likewise, داريوس is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dariusz | Germany, Poland, Indonesia, United States, Philippines |
| Darius | Poland, Indonesia, United States, Philippines, Democratic Republic of the Congo |
| Darijus | United Kingdom, Iceland, United States, Lithuania, Romania |
| داريوس | Sudan |