Surname Jamtveit (Jamtveit 
) , in the world, is a rare cognomen. The cognomen Jamtveit is habitual in Norway, where it is quite a rare surname, and Brazil, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Jamtveit | Norway, Brazil |
| bjørn jamtveit Norwegian geologist and professor (b. 1960) |
|