| Meaning | king |
| Origin | Latin |
| Gender | Boy |
| Popularity | Moderate |
| Length | 3 |
| Syllables | 1 |
| Syllabification | Rex |
Power concentrates itself beautifully in this single-syllable name that commands attention without requiring elaboration. Rex projects authority and confidence, suggesting natural leadership and decisive action. The name's brevity becomes its strength—memorable, unmistakable, and impossible to diminish with unwanted nicknames. Parents choosing Rex often value directness and clarity, appreciating names that make statements rather than suggestions. The sharp consonants and strong vowel create satisfying phonetic punch that resonates when spoken. Rex works brilliantly in professional contexts while maintaining enough warmth for personal relationships. Children bearing this name frequently develop strong self-assurance and independent thinking. The Latin association adds classical weight without feeling antiquated or stuffy. This name requires no explanation, carries no confusion, demands no repetition. Rex suggests someone who leads naturally, whose presence fills rooms without effort. The timeless quality ensures the name never dates, remaining equally appropriate across centuries. For families seeking maximum impact from minimal syllables, who appreciate strength without aggression and authority without arrogance, Rex delivers concentrated excellence.
| Re |
| Rexy |
| Rexie |
| RJ |
| Rexx |
| Rex Tillerson | Former U.S. Secretary of State |
| Rex Grossman | American football player |
| Rex Linn | American actor |
| Rex Stout | American writer |
| Rex Ryan | American football coach |
| Rex Smith | American actor and singer |
| Rex Ingram | Irish film director |
| Rex Allen | American actor and singer |
| Rex Harrison | British actor |
| Rex Reed | American film critic |
| Rex Bell | American actor and politician |
| Rex White | American NASCAR driver |
| Rex Beach | American novelist |
| Rex Gildo | German singer and actor |
| Rex Cherryman | American actor |
| Rex Hargrove | American painter |
| Rex Hays | American basketball player |
| Rex Maughan | American businessman |
| Rex Stewart | American jazz cornetist |
| Rex Banner | The Simpsons character |
| Rex Lewis | Resident Evil video game character |
| Rex Tyler | DC Comics character known as Hourman |
| Rex Power Colt | Far Cry 3 - Blood Dragon video game character |
| Rex Goodwin | Yu-Gi-Oh! 5D's anime character |
| Rex Raptor | Yu-Gi-Oh! Duel Monsters anime character |
| Rex Splode | Invincible comic book character |
| Rex Fury | LEGO City Undercover video game character |
| Rex Kamikaze | Generator Rex animated series character |
| Rex Salazar | Dino Charge Red Ranger character from Power Rangers Dino Super Charge |
| Rex Whistler | The 39 Clues book series character |
| Rex Dangervest | The LEGO Movie 2 - The Second Part character |