Cognomen Melchor Justo (Melchor Justo 
) , globally, is an extremely rare last name. The family name Melchor Justo is habitual in Latin America and the Caribbean, particularly Peru, where it is an extremely rare surname. Also, Melchor Justo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Melchor Justo | Peru |