Surname Mjøsund (Mjøsund 
) , globally, is a very rare family name. The surname Mjøsund is characteristic of Northern Europe, particularly Norway, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mjøsund | Norway |
| kjetil mjøsund Norwegian politician, NO (b. 1967) |
|
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| nina helen mjøsund researcher |
|
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| hanne leirbekk mjøsund researcher |
|