Family name Tjønnfjord (Tjønnfjord 
) , around the world, is an extremely rare surname. The family name Tjønnfjord is characteristic of Northern Europe, particularly Norway, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Tjønnfjord | Norway |
| geir erland tjønnfjord researcher (b. 1953) |
|
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| eirik tjønnfjord researcher |
|