RDJ
The abbreviation RDJ or RdJ stands for:
- Richard David James aka Aphex Twin (* 1971), Irish musician, DJ and label owner
- Robert Downey junior (born 1965), American actor and singer
- Rio de Janeiro , city in Brazil
- Rowing club of the Johanneum, sports club of the learned school of the Johanneum in Hamburg
- Council of German-speaking Youth in East Belgium
