Cognomen Mariyu (Mariyu 
, Марию 
) , in the world, is a rare family name. The cognomen Mariyu is characteristic of Ethiopia, where it is a rare surname, Venezuela, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Ethiopia, India, and Nigeria. More prevalently, Mariyu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mariyu | Venezuela, India, Ethiopia, Nigeria, Japan |
| Марию | Russia |