Reilly
Gender: Unisex
Meaning: Courageous; rye clearing; valiant
Origin: Irish Gaelic — from Ó Raghallaigh (descendant of Raghallach), meaning valiant or courageous
Popularity: Ranked #2855 in 2025 with 60 babies born.
History: A variant or related form of Riley. Shares the meaning 'Courageous; rye clearing; valiant.'
Similar names: reily, rei, rella, rilah, rilee, riley, rilla, reilani
Name length: 6 letters
How common is Reilly? About 1 in 30,819 babies born in 2025 were named Reilly, or roughly 0.3 per day in the United States.
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Frequently asked about Reilly
What does the name Reilly mean?
Reilly means “Courageous; rye clearing; valiant” from Irish Gaelic — from Ó Raghallaigh (descendant of Raghallach), meaning valiant or courageous roots.
What is the origin of the name Reilly?
Reilly has Irish Gaelic — from Ó Raghallaigh (descendant of Raghallach), meaning valiant or courageous origin. The traditional meaning is “Courageous; rye clearing; valiant”.
How popular is Reilly?
Reilly ranked #2822 in 2025 — given to 60 babies that year.
When was Reilly most popular?
Reilly peaked in 1998 with 379 babies registered that year.
Is Reilly a boy or girl name?
Reilly is used for both boys and girls. In the records, about 45% of Reillys are boys and 55% are girls.
Is the name Reilly rising or falling in popularity?
Reilly has fallen 595 spots in the rankings over the last 5 years — from #2227 in 2020 to #2822 in 2025.
How long has Reilly been recorded?
Reilly appears in birth records across 52 years — from 1953 through 2025.