| Gender | Male |
|---|---|
| Origin | |
| Word/name | Latin |
| Meaning | King |
| Other names | |
| Related names | Regis, Reginald, Rexford, Roy, Renato |
Rex is a male given name, short for Rexford or Reginald, derived from the Latin word rex, meaning "king". This is the etymological root word for king in several languages.