| Meaning | valiant |
| Origin | Gaelic, Irish |
| Gender | gender neutral |
| Opposite gender | Reilly |
| Popularity | Moderate |
| Length | 6 |
| Syllables | 2 |
| Syllabification | Reil-ly |
Reilly brings spirited charm to any introduction. This name radiates approachability and warmth, suggesting someone who makes friends easily and navigates social situations with natural grace. The double-l construction gives it substance while maintaining a light, energetic feel. Reilly works exceptionally well in diverse contexts—from playground to boardroom—adapting seamlessly across life stages. It avoids the pitfall of being overly trendy while still feeling contemporary and fresh. Parents who choose Reilly often appreciate its balance between strength and friendliness. The name's compact structure makes it practical for everyday use, yet it carries enough character to stand distinctly on its own. Neither overly common nor obscure, Reilly occupies that sweet spot of recognition without saturation.
| Rei |
| Reils |
| Illy |
| Rye |
| Riley |
| Reilly Opelka | American professional tennis player |
| Reilly Dolman | Canadian actor |
| Reilly Brennan | Venture capitalist and transportation expert |
| Reilly Brown | American comic book artist |
| Reilly Hoagland | American fashion model |
| Reilly Starr | British singer-songwriter |
| Reilly John Roth | American television producer and writer |
| Reilly Kiernan | American actress |
| Reilly Bodycomb | Brazilian jiu-jitsu instructor and author |
| Reilly McKinnon | Canadian curler |
| Reilly O'Connor | Australian rugby league player |
| Reilly Fitzalan | Australian musician |
| Reilly Capps | American journalist and podcaster |
| Reilly Donovan | American actress and singer |
| Reilly O'Toole | American football player |
| Reilly Smith | British guitarist and songwriter |
| Reilly Nelsen | American voice actress |
| Reilly Thorn | Canadian artistic gymnast |
| Reilly Ace of Spies | Character from a British television series |
| Reilly, the Bounty Hunter | Webcomic character |
| Reilly P. Colt | Character from the animated TV series "BraveStarr" |
| Reilly Hollander | Character from the novel "A Simple Plan" |
| Reilly Finch | Character from the TV series "Knots Landing" |