Family name Josaiah (Josaiah 
) , in all the world, is a rare cognomen. The family name Josaiah is characteristic of Nigeria, where it is a rare surname, and the United States, where it is an extremely rare surname. Also, Josaiah is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Josaiah | Papua New Guinea, India, Nigeria, United States, South Africa |