Recent in Baby
When Baby Resists SolidsWhen Baby Resists SolidsBaby Biting TipsBaby Biting Tips5 Tips To Help Prevent Highchair Injuries5 Tips To Help Prevent Highchair InjuriesWhen Baby and Pet MeetWhen Baby and Pet MeetTreatments for ColicTreatments for ColicBaby Milestones – The First YearBaby Milestones – The First YearTips for Relieving Teething PainTips for Relieving Teething PainBenefits of Making Your Own Baby FoodBenefits of Making Your Own Baby Food

Home › Baby Names Directory › Reilley

Reilley

♂ Boy

Pronounced RYE-lee /ˈraɪ.liː/Medium

Meaning: Reilley is a spelling variant of the Irish surname Reilly (Riley), anglicised from O Raghailligh, a Gaelic clan name whose root is often glossed as 'valiant' or 'courageous', though the etymology is debated. It came to boys through the surname-name trend.Low

In 30 seconds: Reilley is a spelling of the Irish surname Reilly or Riley, an old clan name often read as 'valiant'. This spelling stayed rare for boys (said RYE-lee).
💕 Browse more names
Origin LowIrish
MeaningReilley is a spelling variant of the Irish surname Reilly (Riley), anglicised from O Raghailligh, a Gaelic clan name whose root is often glossed as 'valiant' or 'courageous', though the etymology is debated. It came to boys through the surname-name trend.
U.S. rank (2016)#13745 ↘ Falling
2016 U.S. births5 boys (0.00% of U.S. boys)
Peak year2008
Total births (all-time)≈ 107

Popularity in the U.S. · SSA data

peak 200819982016

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Reilley is an Irish surname spelling of Reilly, anglicised from O Raghailligh. As a first name it belongs to the wave of Irish surnames adopted for children, with Riley by far the most common form; this doubled-l, -ey variant is a family flourish rather than a separate name.

It stayed uncommon for boys, given to only about sixteen a year at its peak in the two-thousands even as plain Riley soared. A boy named Reilley then is a teenager or young adult today.

Did you know? Reilley preserves the older Irish -eilley look of Reilly, while the simpler Riley became the runaway hit; all trace back to the O Raghailligh clan of counties Cavan and Meath.
Overall data confidence 42%
References - Reilley — Spelling of Irish surname Reilly/Riley; O Raghailligh clan

Variations

ReillyRileyRylee

Nicknames

RyeReilsLee

Famous Bearers

  • Famous bearers coming soon.

If you like Reilley…

Rylan— a like Irish-flavored surname name for boys
Kiley— a similar Irish -ley surname name
Ryley— shares the -ey ending
Roney— another surname-name pick
Rhyley— another surname-name pick

Explore names like Reilley

By themeraresurname-namerespellingirish

All themes →All meanings →All origins →

Frequently Asked

What does the name Reilley mean?

It is a spelling of the Irish surname Reilly, from the O Raghailligh clan, often read as 'valiant'; the etymology is debated.

How do you pronounce Reilley?

It is said RYE-lee, two syllables with the stress at the front, like Riley.

Is Reilley a boy or girl name?

Here Reilley is used as a boy's name; Riley is given to both.

How popular is Reilley?

It was rare in this spelling, given to only about sixteen boys a year at its peak in the two-thousands.

💬 Ask Nia