Cognomen Japhat (Japhat 
) , in the world, is a rare last name. The surname Japhat is characteristic of Nigeria, where it is a rare surname, Tanzania, where it is a very rare surname, and India, where it is an extremely rare surname. More prevalently, Japhat is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Japhat | Nigeria, Tanzania, Kenya, India, Democratic Republic of the Congo |