Surname Roien (Roien 
) , around the globe, is a rare cognomen. The family name Roien is habitual in Afghanistan, where it is a rare surname, Denmark, and the United Kingdom, where it is an extremely rare surname. Likewise, Roien is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Roien | Afghanistan, Pakistan, Philippines, United States, Denmark |