UK name, mostly boys
Dillan
A masculine name of Celtic origin, possibly derived from the Gaelic elements "dil" (faithful) and "an" (descendent, little one).
For 2026, the newest official UK baby-name figures on this page are from 2024. That release is the current official benchmark rather than a forecast.
Dillan is mostly registered for boys in the UK records. People looking for Dillan popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #2443, with 9 babies registered with the name. Its strongest year in the published records was 2011, with 53 births.
This profile covers 906 England and Wales registrations across 29 recorded years from 1996 to 2024. The figures come from ONS England and Wales, NRS Scotland 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.
The latest count is about 17% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 1,002 living people in the UK are called Dillan. 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 2025 or 2026.
Key insights
- • Dillan ranked #2443 for boys in England and Wales in 2024, with 9 registrations.
- • The name peaked in 2011, when 53 boys were registered as Dillan.
- • Dillan ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #398 in 2014.
- • About 1,002 living people in the UK are estimated to have Dillan as a first name, after adjusting past birth registrations with ONS life tables.
- • Across the England and Wales records shown here, 99.7% of Dillan registrations are for boys.
Latest rank (E&W)
#2443
2024
Births in 2024
9
Latest year
Peak year
2011
53 births
Estimated living
1,002
2026
Gender
Boy and girl registrations for Dillan
In England and Wales birth records, Dillan has been registered for both boys and girls. Across the years shown here, 99.7% of registrations are for boys and 0.3% are for girls.
These figures use the sex categories in the published baby-name files. They are useful for spotting how the name is used at registration, but they are not a live measure of gender identity or everyone living with the name today.
Dillan registered for boys
- Ranked #2,443 in 2024
- 9 boys registered in 2024
- Peak: 2011 (53 births)
Dillan registered for girls
- Ranked #5,201 in 2007
- 3 girls registered in 2007
- Peak: 2007 (3 births)
Meaning
What does Dillan mean?
The name Dillan is derived from the Irish Gaelic name Dillón, which is a variant of the more common Irish name Dillon. The name Dillon itself is believed to have its origins in the Old Irish Gaelic word "dill" or "díl," meaning "pledge" or "tribute." It was a surname that emerged in medieval Ireland as a patronymic name, meaning "descendant of the pledge-giver."
In its earliest recorded use, the name Dillon was associated with the Dillon family, an ancient Irish clan that traced its roots back to the 6th century. The Dillon clan held significant power and influence in the province of Connacht, particularly in County Mayo and County Roscommon. The name Dillan, as a variant spelling of Dillon, likely emerged from this historical lineage.
One of the earliest recorded individuals with the name Dillon was Aedh Dillon, who lived in the 12th century and was a prominent member of the Dillon clan. He was known for his military exploits and his role in defending the clan's territories against rival clans.
Another notable figure bearing the name was Sir Robert Dillon, who lived in the 15th century and served as Chief Justice of the Irish Common Pleas. He played a significant role in the administration of justice during a turbulent period in Irish history.
In the 16th century, Sir Lucas Dillon, a member of the Dillon clan, gained recognition for his military service and his role in suppressing rebellions against English rule in Ireland. He was knighted for his loyalty to the English crown.
Moving forward to the 17th century, we find Theobald Dillon, a renowned Irish soldier and military leader who fought in the Wars of the Three Kingdoms. He was a staunch supporter of the Catholic cause and played a crucial role in the Irish Confederate Wars against English and Scottish forces.
In more recent times, one of the most famous individuals with the name Dillan was Dillan Merrill, an American singer-songwriter and musician who gained popularity in the early 2000s. Born in 1987, he achieved success with his unique blend of folk and indie rock music, releasing several critically acclaimed albums.
While the name Dillan has its origins in Ireland and has a long historical lineage, it has gained popularity across various cultures and regions in modern times, transcending its original Irish roots and becoming a name with global recognition.
Sourced from namecensus.com.
Popularity
Dillan over time
The chart below compares boys and girls registered as Dillan in England and Wales, from 1996 to 2024. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Dillan, the clearest high point is 2011. The latest England and Wales figure is 9 births in 2024, compared with 53 at the peak.
Babies born per year
Decades
Dillan by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Dillan 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 | #2271 | 51 | 5 |
| 2010s | #1155 | 309 | 10 |
| 2000s | #593 | 430 | 10 |
| 1990s | #609 | 116 | 4 |
Geography
Where Dillan is most common
The bars show the latest published local birth counts for Dillan. 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.
Dillan ranks best in Northern Ireland in the latest published regional snapshot for that area, where it placed #398 in 2014.
Across the UK
Dillan in Scotland and Northern Ireland
Scotland (NRS)
#707 in 2016
20 years of NRS records, 91 total registered
Northern Ireland (NISRA)
#398 in 2014
4 years of NISRA records, 13 total registered
Notable bearers
Famous people named Dillan
-
Dillan Perras
curler; curling coach
Scottish male curler and coach
1976-
-
Dillan Hill
candidate in the 2024 United Kingdom general election
Related
Names similar to Dillan
- Daniel 120,900
- Dylan 60,836
- David 37,852
- Dominic 20,480
- Declan 11,657
- Dexter 11,627
- Danny 8,434
- Dean 5,329
- Dillon 4,113
- Douglas 3,773
- Dominik 3,494
- Damian 3,486
FAQ
Dillan: questions and answers
How popular is the name Dillan in the UK right now?
In 2024, Dillan was ranked #2443 for boys in England and Wales, with 9 births registered.
When was Dillan most popular?
The peak year on record was 2011, with 53 babies registered as Dillan in England and Wales.
What is the meaning and origin of Dillan?
A masculine name of Celtic origin, possibly derived from the Gaelic elements "dil" (faithful) and "an" (descendent, little one).
How many people are called Dillan in the UK?
A total of 906 babies have been registered as Dillan across the 29 years of ONS England & Wales records shown here, plus 91 more in Scotland and 13 in Northern Ireland.
Where is Dillan most common?
In the latest published local rankings, Dillan ranks best in Northern Ireland, where it placed #398 in 2014. 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.