Reilly
Reilly is a boy's name of Irish origin.
Meaning
Valiant, courageous, or descendant of Raghallach.
Origin and history
Reilly is an Irish surname derived from the Gaelic Ó Raghallaigh, meaning descendant of Raghallach. Though historically a surname, it gained popularity in the U.S. as a unisex given name starting in the late 20th century. Today it remains a recognizable, classic Irish surname-turned-given-name for boys.
Popularity in the United States
4,560 babies in the United States have been named Reilly since 1880. It ranks #1838 all-time. Among babies born since 2020 it ranks #1611.
States where it is most popular
- CA (16 %)
- NY (10.7 %)
- PA (9.8 %)
- TX (7.9 %)
- FL (7.1 %)
Trends by decade
| Decade | Births |
|---|---|
| 1880-1890 | 0 |
| 1890-1900 | 0 |
| 1900-1910 | 0 |
| 1910-1920 | 0 |
| 1920-1930 | 0 |
| 1930-1940 | 0 |
| 1940-1950 | 0 |
| 1950-1960 | 13 |
| 1960-1970 | 0 |
| 1970-1980 | 18 |
| 1980-1990 | 206 |
| 1990-2000 | 1,032 |
| 2000-2010 | 1,916 |
| 2010-2019 | 1,059 |
| 2020-2029 | 316 |
Famous people named Reilly
- Reilly Opelka: Tennis Player
Nicknames
Rye
Fun facts
- Reilly originated as an Irish clan name from County Cavan, where the O'Reillys were a powerful ruling family.
- Reilly is a common alternative spelling of Riley, keeping closer to the traditional Irish surname form.