Cognomen Kierian (Kierian 
) , in the world, is a rare last name. The last name Kierian is habitual in Nigeria, where it is a very rare surname, and the United States, where it is an extremely rare surname. Likewise, Kierian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kierian | United Kingdom, Canada, France, United States, Nigeria |