Cognomen Sveinbjarnarson (Sveinbjarnarson 
) , in all the world, is a very rare last name. The cognomen Sveinbjarnarson is habitual in Iceland, where it is quite a common surname, the United Kingdom, where it is an extremely rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Sveinbjarnarson | Iceland, United States, United Kingdom |
| hrafn sveinbjarnarson (b. 1166) |
|
|
| eiríkur sveinbjarnarson (b. 1277) |
|