Family name Janesia (Janesia 
) , across the world, is a very rare cognomen. The cognomen Janesia is habitual in Indonesia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Also, Janesia is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Janesia | Indonesia, India, Brazil, United States, Tanzania |