Last name Þorvarðsson (Þorvarðsson 
) , all over the world, is an extremely rare surname. The cognomen Þorvarðsson is habitual in Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Þorvarðsson | Iceland |
| ólafur kalstað þorvarðsson (b. 1911) |
|