Cognomen ارنس (ارنس 
, Arns 
) , across the world, is quite a rare surname. The family name ارنس is characteristic of Germany, where it is quite a rare surname, Netherlands, where it is a rare surname, and New Zealand. In absolute terms, it most frequently occurs in Germany, the United States, and Brazil. Very seldom, ارنس is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ارنس | Palestinian Territory, Iraq |
| Arns | Netherlands, Germany, Canada, United States, Brazil |