Reilly

Reilly: name meaning, origin & popularity

Meaning: “descendant of Raghallach”
Origin: Irish
Say it: RYE-lee · 2 syllables
Used for: Both (55% girls, 45% boys since 1880)

Anglicized form of the Irish surname Ó Raghallaigh, used as a given name. The personal name Raghallach is of uncertain meaning, so this spelling’s deeper etymology is not fully certain.

Irish names Surname-style names Modern names

How popular is Reilly?

202433.0 per million US babies

Drag the line or the slider to read any year. Values are per million US births recorded by Social Security. Records before about 1937 undercount births, so early peaks can look taller than they were.

Compare with another name

Babies named Reilly in 2024109

2024 rank#2,723 girls

Peak year1997

Total US babies since 18809,977

Reilly is fading: recent use is about 52% of its level ten years before.

Names like Reilly

Variants, related forms and names with the same roots.

Rileyvaliant · Irish
Rowanlittle red-haired one · Irish
Quinndescendant of Conn · Irish
Roryred king · Irish
Lennonlover · Irish
Caseyvigilant · Irish
Murphysea warrior · Irish
Rowenlittle red one · Irish

Reilly questions

What does the name Reilly mean?

Reilly means "descendant of Raghallach". It comes from Irish. Anglicized form of the Irish surname Ó Raghallaigh, used as a given name. The personal name Raghallach is of uncertain meaning, so this spelling’s deeper etymology is not fully certain.

Is Reilly a boy or girl name?

Reilly is used for both: about 55% of US babies named Reilly since 1880 were girls.

How popular is Reilly?

109 US babies were named Reilly in 2024. Its peak year was 1997.

How do you pronounce Reilly?

Reilly is usually pronounced RYE-lee.

Birth counts: US Social Security Administration national data, 1880–2024 (names given to 5+ babies of a sex in a year). How we write meanings.