Cognomen Redja (Redja 
) , across the world, is a rare family name. The family name Redja is characteristic of North Macedonia, where it is quite a rare surname, Indonesia, where it is a rare surname, and Switzerland. Not in comparison with a country's population, it is the most numerous in Indonesia, North Macedonia, and Algeria. Also, Redja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Redja | North Macedonia, Brazil, Indonesia, Democratic Republic of the Congo, Algeria |