Family name Armannsson (Armannsson 
) , all around the world, is a rare cognomen. The last name Armannsson is characteristic of Northern Europe, particularly Iceland, where it is quite a common surname, Norway, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname. Very seldom, Armannsson is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Armannsson | Norway, France, Iceland, United States, United Kingdom |