Cognomen Арнис (Arnis 
, Арнис 
, Arnys 
) , globally, is quite a rare last name. The surname Арнис is characteristic of Latvia, where it is quite a rare surname, Greece, and Indonesia, where it is a rare surname. More frequently, Арнис is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arnis | Indonesia, Democratic Republic of the Congo, Latvia, Greece, Albania |
| Арнис | Kyrgyzstan, Russia, Ukraine |
| Arnys | Mexico, Honduras, United States, Brazil, Venezuela |