Dillan
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Meaning
variant of Dylan, traditionally 'son of the sea'
How popular is Dillan around the world?
In the United States, 347 babies were named Dillan between 2020 and 2025.
Dillan is on the official records of the United States, England and Wales and Brazil.
United States
1 in 63,000
In the United States, 347 babies were named Dillan between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Dillan peaked in the 2000s.
Births with a Social Security record. Source: U.S. Social Security Administration
England and Wales
1 in 84,000
In England and Wales, 7 boys named Dillan were born in 2025, ranked 2,952nd among boys that year.
share of that year’s name registrations
Birth registrations in England and Wales (not the whole UK); exact spellings are counted separately, and any spelling under 3 in a year is withheld at source. Source: Office for National Statistics, baby names in England and Wales
Brazil
1 in 1M
At the 2022 census, 178 people in Brazil were named Dillan, ranked 27,587th, with a median age of 10.
Among people named Dillan living in Brazil at the 2022 census, more were born in the 2010s than in any other decade.
people alive at the 2022 census, by decade of birth
The census also counted 44 born between 2020 and August 2022, too recent a span to chart. People alive and resident in Brazil at the 2022 census, a living-population count, not births; names under 20 are withheld at source. Source: IBGE, Censo Demográfico 2022
Argentina
last on record 2020
Dillan is not on the 2024 record for Argentina, where small counts are withheld at source.
share of that year’s name registrations
Given-name components of births in Argentina 2012–2024; national cells are lower bounds and no sex split is published. Source: RENAPER (Argentina), Dirección Nacional de Población, given names 2012-2024
Canada
last on record 2016
Dillan is not on the 2024 record for Canada, where names under 5 in a year are excluded at source.
share of that year’s name registrations
First given names from provincial and territorial vital statistics across Canada; any name-sex-year under 5 is excluded at source, and small Quebec counts carry a randomized adjustment made at source. Shares divide by Statistics Canada’s count of live births for the year; the 2024 count is preliminary. Source: Statistics Canada, first names at birth (table 17-10-0147-01)
Chile
last on record 2017
Dillan is not on the 2021 record for Chile, where nametree keeps the spellings that reached 5 registrations in some year.
share of that year’s name registrations
First-name registrations with Chile’s civil registry by year of registration, 1920–2021, counted as spelling groups (Sofía, Sofia and Sofìa are one name, shown with its most-registered spelling); the registry withholds nothing, nametree keeps the groups that reached 5 registrations in some year, and shares divide by every registration of the year. Source: Servicio de Registro Civil e Identificación (Chile) via the guaguas package, first-name registrations 1920-2021
Ireland
last on record 2015
Dillan is not on the 2025 record for Ireland, where names under 3 in a year are withheld at source.
The count never rose above 6 in a year, too few to chart.
Exact registered spellings from Irish vital statistics; any name under 3 in a year is withheld at source, and accented spellings (fadas) are recorded reliably only from 2018. Source: Central Statistics Office (Ireland), Irish babies' names
Mexico City City
last on record 2018
Dillan is not on the 2022 record for Mexico City, where small counts are withheld at source.
share of that year’s registrations in the city
Civil-registry acts in Mexico City by registration year. Counts are lower bounds (names under 6 in a month and borough are removed at source) and count name-instances, not people; compound names are split, so “Maria Jose” counts under each part. 2023, a partial extract through 3 Mar with no cell on record for this name, is excluded. Source: Registro Civil of Mexico City, open data portal, registered given names 2000-2023
Montevideo City
last on record 2009
Dillan is not on the 2011 record for Montevideo, whose registry withholds nothing, so the spelling was not given there that year.
The count never rose above 1 in a year, too few to chart.
Births in the department of Montevideo (not all of Uruguay) by first name and year of birth, 1940–2011, from the city’s civil registry, which writes names in capitals, almost always without accents; counted as spelling groups (accent and punctuation variants merged), nothing is withheld at source, and 2012 is excluded as a partial year. Source: Servicio de Registro Civil, Intendencia de Montevideo, Partidas de Registro Civil de Montevideo (Licencia de Datos Abiertos - Uruguay); 2012 dropped as partial
New Zealand
last on record 1992
Dillan is not on the 2025 record for New Zealand, where names under 10 in a year are excluded at source.
share of that year’s name registrations
First given names from New Zealand birth registrations, grouped by registration year; any name under 10 in a year is excluded at source. Shares divide by Stats NZ’s count of births registered to mothers living in New Zealand, under 1% below the registry’s own count. Source: Department of Internal Affairs (New Zealand), baby name popularity over time
Scotland
last on record 2016
Dillan is not on the 2024 record for Scotland, where spellings under 3 in total are suppressed at source.
The count never rose above 8 in a year, too few to chart.
Births registered in Scotland; different spellings count separately but accents are merged at source, and any spelling under 3 in total is suppressed. Source: National Records of Scotland, babies' first names
South Australia
last on record 2012
Dillan is not on the 2017 record for South Australia, whose registry publishes every name given that year.
The count never rose above 6 in a year, too few to chart.
Births registered in South Australia (not all of Australia) by first name and year of registration, 1944–2017, from the state’s Births, Deaths and Marriages registry, which publishes every name down to a single birth in capitals; a spelling its export repeats inside a year is counted once, and from 2018 only a top 100 is published, so the series ends at 2017. Source: Consumer and Business Services (South Australia), popular baby names
Not on the record in Spain, Puerto Rico and Poland: those registries withhold small counts, so rare uses may sit below their floors.
Not on the France record: nametree keeps spellings that reached 20 births in some year, so rarer uses are not shown. Not on the Austria record for 1984 to 2025: Statistik Austria publishes every first name down to a single birth, so this name was not given there in those years (before 2010 the record covers babies with Austrian citizenship only). Not on Norway’s list: Statistics Norway lists only first names carried by 200 or more living people, so rarer names are not shown.
When you meet Dillan
Most people given the name Dillan in the United States are teenagers or young adults today.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Dillan deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Dillan truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Dillan fits with your family’s names and surname.
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