Surname Guðbjartsson (Guðbjartsson 
) , across the world, is a very rare family name. The last name Guðbjartsson is habitual in Iceland, where it is quite a common surname, Norway, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Guðbjartsson | United States, Iceland, Norway |
| þórður guðbjartsson (b. 1891) |
|
|
| óli þorbjörn guðbjartsson Icelandic politician, IS (b. 1935) |
|