Cognomen Sønstabø (Sønstabø 
) , all over the world, is a very rare family name. The cognomen Sønstabø is characteristic of Northern Europe, particularly Norway, where it is a rare surname, and Denmark.
| VARIANT | COUNTRY |
|---|---|
| Sønstabø | Norway, Denmark |
| per sønstabø Norwegian association football player (b. 1941) |
|