Family name Мариус (Marius 
, Maryus 
, Marious 
) , in all the world, is a common surname. The cognomen Мариус is habitual in Romania, where it is a common surname, Saint Lucia, where it is quite a common surname, and Martinique (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Romania, Cameroon, and Ivory Coast. More prevalently, Мариус is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marius | France, Ivory Coast, Romania, South Africa, Democratic Republic of the Congo |
| Maryus | Spain, France, Romania, United States, Italy |
| Marious | France, Cameroon, Romania, South Africa, United States |
| Мариус | Lithuania, Bulgaria, Belarus, Armenia, Russia |