NameCensus.

UK boy's name

Reily

Possibly a variant spelling of the Irish surname Riley meaning "valiant, courageous".

For 2026, the newest official UK baby-name figures on this page are from 2016. That release is the current official benchmark rather than a forecast.

Reily is a boy's name in the UK records. People looking for Reily popularity in 2026 should use the latest official release, which is 2016 in this profile. In that release it ranked #4023, with 4 babies registered with the name. Its strongest year in the published records was 2008, with 7 births.

This profile covers 35 England and Wales registrations across 7 recorded years from 2002 to 2016. The figures come from ONS England and Wales and NRS Scotland, so the page is a view of published baby-name registrations rather than a forecast or a live count of people using the name today.

The latest count is about 57% of the recorded peak, which gives a quick read on how the name has moved since its high point.

We estimate that about 39 living people in the UK are called Reily. This uses published birth registrations from England and Wales, Scotland and Northern Ireland, then applies ONS national life tables to estimate how many are likely still alive. It does not forecast extra births for 2017 or 2026.

Key insights

  • Reily ranked #4023 for boys in England and Wales in 2016, with 4 registrations.
  • The name peaked in 2008, when 7 boys were registered as Reily.
  • Reily ranks best in Scotland in the latest published regional snapshot for that area, where it placed #548 in 2010.
  • About 39 living people in the UK are estimated to have Reily as a first name, after adjusting past birth registrations with ONS life tables.

Latest rank (E&W)

#4023

2016

Births in 2016

4

Latest year

Peak year

2008

7 births

Estimated living

39

2026

Meaning

What does Reily mean?

The name Reily is a variant spelling of the Irish name Riley, which has its origins in the Gaelic name "O'Raghailligh" or "O'Reilly". This name is derived from the word "riaghail", meaning "rule" or "ruler", suggesting that the original bearers of this name may have held positions of authority or leadership within their communities.

The name Reily can be traced back to medieval Ireland, where it was prevalent among the O'Reilly clan, a powerful and influential family based in County Cavan. The O'Reillys were recognized as the hereditary lords of East Breffny, an area that encompassed parts of modern-day counties Cavan and Longford.

One of the earliest recorded mentions of the name can be found in the Annals of Ulster, a chronicle of medieval Irish history, which references a notable figure named Gilla-na-naem O'Reilly in the year 1256. This individual was described as the "Chief of Muintir-Maolmordha", indicating his position of leadership within his community.

Throughout history, several noteworthy individuals have borne the name Reily or its variants. In the 16th century, Sir John O'Reilly was a prominent Irish soldier who fought in the Nine Years' War against English forces in Ireland. He was known for his bravery and military prowess.

In the 17th century, Edmund O'Reilly was an Irish Catholic priest and historian who authored several works on Irish history and culture, including the "Descriptive Catalogue of Eminent Irish Writers".

Fast-forwarding to the 19th century, John Boyle O'Reilly was an Irish-born poet, journalist, and activist who played a significant role in the Irish nationalist movement. He was born in 1844 and later emigrated to the United States, where he became a prominent voice for Irish independence.

Another notable figure with the name was Mary Reilly, an Irish-American labor organizer and activist who fought for the rights of working-class women in the early 20th century. She was born in 1873 and played a crucial role in the formation of the National Women's Trade Union League.

In the realm of sports, Jimmy Reilly was an American baseball player who played in the Major League Baseball from 1899 to 1909. He was born in 1875 and was known for his exceptional defensive skills as an outfielder.

While these examples illustrate the historical presence of the name Reily and its variants across various fields and eras, it is important to note that this is not an exhaustive list, as the name has been borne by countless individuals throughout the ages.

Sourced from namecensus.com.

Popularity

Reily over time

The chart below shows babies named Reily registered in England and Wales in the years where the name appears in the published records, from 2002 to 2016. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.

For Reily, the clearest high point is 2008. The latest England and Wales figure is 4 births in 2016, compared with 7 at the peak.

Babies born per year

Reily
02457200220092016

Decades

Reily by decade

Decade totals smooth out the yearly jumps and make it easier to see whether Reily was a short-lived spike or a name that stayed in regular use. Average rank is calculated only from years where a published rank exists.

Decade Average rank Total births Years covered
2010s #3323 16 3
2000s #2992 19 4

Geography

Where Reily is most common

The bars show the latest published local birth counts for Reily. They are useful for spotting where the name is showing up in real numbers, while the rank beside each bar shows how strongly it performs inside that region.

Reily ranks best in Scotland in the latest published regional snapshot for that area, where it placed #548 in 2010.

Scotland
4

Across the UK

Reily in Scotland and Northern Ireland

Scotland (NRS)

#548 in 2010

1 years of NRS records, 4 total registered

Related

Names similar to Reily

FAQ

Reily: questions and answers

How popular is the name Reily in the UK right now?

In 2016, Reily was ranked #4023 for boys in England and Wales, with 4 births registered.

When was Reily most popular?

The peak year on record was 2008, with 7 babies registered as Reily in England and Wales.

What is the meaning and origin of Reily?

Possibly a variant spelling of the Irish surname Riley meaning "valiant, courageous".

How many people are called Reily in the UK?

A total of 35 babies have been registered as Reily across the 7 years of ONS England & Wales records shown here, plus 4 more in Scotland.

Where is Reily most common?

In the latest published local rankings, Reily ranks best in Scotland, where it placed #548 in 2010. The regional bars on this page use birth counts, so they also reflect the size of each region.

Which records is this page based on?

The England and Wales timeline uses ONS baby-name records. Scotland figures come from NRS and Northern Ireland figures come from NISRA. Counts are registrations in published baby-name files. The living estimate uses those birth registrations with ONS national life tables.