Cognomen Vatnøy (Vatnøy 
) , in the world, is a very rare last name. The cognomen Vatnøy is habitual in Northern Europe, particularly Norway, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Vatnøy | Norway |
|
eirik vatnøy (b. 1983) |
|
|
hanne vatnøy NO (b. 1984) |
|
| torunn kitty vatnøy researcher (ORCID 0000-0003-0945-5522) |
|