Around the world, Unnsteinn (Unnsteinn 
) is an extremely rare unknown gender forename.
| VARIANT | COUNTRY |
|---|---|
| Unnsteinn | Iceland |
| unnsteinn kárason association football player (b. 1963) |
|
Elvarsson, Oddsson, Ólafsson, Stefánsson, Garðarsson, Guðmundsson, and Þórðarson