UK boy's name
Riain
For 2026, the newest official UK baby-name figures on this page are from 2021. That release is the current official benchmark rather than a forecast.
Riain is a boy's name in the UK records. People looking for Riain popularity in 2026 should use the latest official release, which is 2021 in this profile. In that release it ranked #3990, with 4 babies registered with the name. Its strongest year in the published records was 2021, with 4 births.
This profile covers 10 England and Wales registrations across 3 recorded years from 1998 to 2021. The figures come from ONS England and Wales and NISRA Northern Ireland, 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.
Riain is at its recorded peak in the England and Wales series.
We estimate that about 30 living people in the UK are called Riain. 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 2022 or 2026.
Key insights
- • Riain ranked #3990 for boys in England and Wales in 2021, with 4 registrations.
- • The name peaked in 2021, when 4 boys were registered as Riain.
- • Riain ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #421 in 2016.
- • About 30 living people in the UK are estimated to have Riain as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#3990
2021
Births in 2021
4
Latest year
Peak year
2021
4 births
Estimated living
30
2026
Popularity
Riain over time
The chart below shows babies named Riain registered in England and Wales in the years where the name appears in the published records, from 1998 to 2021. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Riain, the clearest high point is 2021. The latest England and Wales figure is 4 births in 2021, compared with 4 at the peak.
Babies born per year
Decades
Riain by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Riain 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 |
|---|---|---|---|
| 2020s | #3990 | 4 | 1 |
| 2000s | #3651 | 3 | 1 |
| 1990s | #2901 | 3 | 1 |
Geography
Where Riain is most common
The bars show the latest published local birth counts for Riain. 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.
Riain ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #421 in 2016.
Across the UK
Riain in Scotland and Northern Ireland
Northern Ireland (NISRA)
#421 in 2016
6 years of NISRA records, 20 total registered
Related
Names similar to Riain
- Ryan 68,692
- Riley 37,992
- Robert 27,462
- Reuben 25,122
- Rhys 24,418
- Reece 24,329
- Rory 21,870
- Roman 16,609
- Ronnie 16,445
- Reggie 14,684
- Rowan 14,371
- Ralph 8,892
FAQ
Riain: questions and answers
How popular is the name Riain in the UK right now?
In 2021, Riain was ranked #3990 for boys in England and Wales, with 4 births registered.
When was Riain most popular?
The peak year on record was 2021, with 4 babies registered as Riain in England and Wales.
How many people are called Riain in the UK?
A total of 10 babies have been registered as Riain across the 3 years of ONS England & Wales records shown here and 20 in Northern Ireland.
Where is Riain most common?
In the latest published local rankings, Riain ranks best in Northern Ireland, where it placed #421 in 2016. 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.