Cognomen Willianov (Willianov 
) , across the world, is an extremely rare family name. The cognomen Willianov is habitual in Israel, where it is a very rare surname, and the United States, where it is an extremely rare surname. Predominantly, Willianov is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Willianov | Israel, United States, Democratic Republic of the Congo |
Iloy-Okandze, and Mouakindza