Cognomen Japhan (Japhan 
) , across the world, is a very rare last name. The family name Japhan is habitual in Tanzania, where it is a very rare surname, Thailand, and Nigeria, where it is an extremely rare surname. Likewise, Japhan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Japhan | Philippines, Nigeria, Thailand, Tanzania, India |