Surname Thorbjarnarson (Thorbjarnarson 
) , all over the world, is a very rare family name. The cognomen Thorbjarnarson is characteristic of Iceland, where it is quite a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thorbjarnarson | Iceland, United States |
| john thorbjarnarson American zoologist, US (b. 1957) |
|
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| kathryn w. thorbjarnarson academic |
|