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 | United States, Iceland, United Kingdom |
| hrafn sveinbjarnarson (b. 1166) |
|
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| eiríkur sveinbjarnarson (b. 1277) |
|