Cognomen Wannis (Wannis 
) , around the globe, is a rare last name. The surname Wannis is habitual in Lebanon, where it is quite a rare surname, Australia, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Much less frequently, Wannis is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wannis | Australia, Italy, Brazil, United States, Lebanon |