Cognomen Janethy (Janethy 
) , in the world, is an extremely rare family name. The surname Janethy is habitual in Latin America and the Caribbean, particularly Mexico, where it is an extremely rare surname. Much more frequently, Janethy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Janethy | Malaysia, Philippines, Mexico, Tanzania, Brazil |