Declining since 1998.
Popularity of Reiley since 1991
Babies named Reiley per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls | Boys |
|---|---|---|
| 1990s | 158 | 57 |
| 2000s | 287 | 199 |
| 2010s | 148 | 52 |
| 2020s | 25 | 16 |
Meaning & origin
Reiley is a modern respelling of the popular name Riley, which first appeared in U.S. records in 1991. Its peak year was 1998, after which usage has steadily declined, reflecting a broader trend away from creative -ley spellings. Historically, the name Riley is derived from an Irish surname, but Reiley represents a deliberate orthographic variation that gained traction during the 1990s preference for unique spellings. As a unisex name, it has never ranked in the top 1,000 for either gender, and its low 1-in-N incidence means it remains a rare choice. The name's trajectory shows a falling pattern since 1998, consistent with the decline of similar invented spellings. Without a clear top state concentration, Reiley's usage has been geographically diffuse. This data supports that Reiley is best understood as a stylistic variant rather than a name with deep historical roots, reflecting American naming trends toward individualization through spelling innovation.
Reiley is a contemporary respelling of Riley, which itself originates from the Irish surname Ó Raghallaigh (descendant of Raghallach, possibly meaning 'valiant'). It may also derive from the Old English 'ryge leah' (rye clearing). The spelling Reiley emerged in the late 20th century, part of a trend of -ley and -lee name variants. It has been used for both boys and girls since first appearing on U.S. records in 1991.
Nicknames & variants
Nicknames: Rye, Lee, Rei
Sibling names for Reiley
Names that share Reiley's style, for a brother or sister.

