Reilly
GirlEnglish
Reilly is a girl name of English origin meaning "Courageous, valiant".
About this name
Gender
Girl
Language
English
Religion
None
Popularity
3 / 100
Syllables
2
Length
6 letters
Meaning
Courageous, valiant
Etymology
Variant of Irish surname 'Reilly' or 'O'Reilly', from Gaelic 'Ó Raghallaigh': 'raghallach' (courageous, valiant).
Famous People Named Reilly
- Reilly Opelka — American tennis player (born 1997)
Frequently Asked Questions About Reilly
What does the name Reilly mean?
Reilly means "Courageous, valiant", and is of English origin.
What is the origin of the name Reilly?
Reilly originates from English, commonly used in Europe.
Is Reilly a boy or girl name?
Reilly is typically used as a girl name.
What religion is the name Reilly associated with?
Reilly is associated with None.
Are there famous people named Reilly?
Yes — notable people named Reilly include Reilly Opelka (American tennis player, born 1997).
Last updated: June 2026