Last name Þorsteins (Þorsteins 
) , around the globe, is an extremely rare surname. The surname Þorsteins is habitual in Northern Europe, particularly Iceland, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Þorsteins | Iceland |
| karl þorsteins Icelandic chess player, IS (b. 1964) |
|
Þórdís, and Sigurbjörg