Jillian
given name · Latin script
Meaning: English form related to Gillian/Julian, from Latin Iulianus
Recorded as a female name· opposite-gender records fall within measured source noise
/ˈdʒɪɫiən/(machine-generated) pronunciation, model-generated
Jillian is a given name written in the Latin script, with more bearers in the United States than in any other country.
- USUnited States1 in 4.2K(measured from records)
- GBUnited Kingdom≈1 in 1Kas Gillian
- IEIreland≈1 in 2.1Kas Gillian
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Jillian itself, the figure is that spelling’s, and it is named. One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- 4 (measured from records)
- Sources
- 503 (measured from records)
- 1 in 4.2K (inferred from the name graph)
78,761 people, 2020
recorded for this name
Highest-authority source
United States
measured from records inferred from the name graph
Spellings & scripts(measured from records)
Locally spelled Gillian in GB United Kingdom, AU Australia, ZA South Africa and 2 more.
Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
Meaning & origin(measured from records)
English form related to Gillian/Julian, from Latin Iulianus.
Sources 1
- Dictionnaire généalogique des prénoms
Attested across 12 languages in the etymology graph.
Where in the world(measured from records)
Jillian counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| US United States | #697 | 78,761 | 1 in 4.2K | 79K | Jillian | 503 |
| CN China | — | ≈71,000 est. | ≈1 in 20K | — | Jillian | 37 |
| GB United Kingdom | #150 | ≈63,000 est. | ≈1 in 1K | 5 | Gillian | 314 |
| ZA South Africa | #549 | ≈12,000 est. | ≈1 in 4.8K | — | Gillian | 97 |
| AU Australia | #276 | ≈9,700 est. | ≈1 in 2.6K | 90 | Gillian | 206 |
| IE Ireland | #196 | ≈2,500 est. | ≈1 in 2.1K | — | Gillian | 128 |
| NZ New Zealand | #245 | ≈1,500 est. | ≈1 in 3.2K | 16 | Gillian | 120 |
| GY Guyana | — | 264as Gillian | 1 in 2.8K | 264 | — | 5 |
78,761 people counted by Census Bureau — First Name Frequency 2020 by sex, 2020. Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.
Registers cited: Census Bureau — First Name Frequency 2020 by sex; NRS — Baby names Scotland full list (1974–present); NSW BDM — Popular baby names (1952–present); DIA — Baby name popularity (1900–present); Guyana — Official List of Electors July 2025. Figures without a register are Mondonomo estimates; see Methodology.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).
Other recorded senses(measured from records)
Jillian is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In French, Forme anglaise féminine liée à Gillian/Julian; apparentée à Gilles. Usage moderne de prénom féminin.
as a nameDictionnaire généalogique des prénoms
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name(measured from records)
- Gillian Armstrongb. 1950AUfilm director
- Jill Talleyb. 1962USnot in their usual nameAmerican actress
- Gillian Andersonb. 1968USAmerican actress (born 1968)
- Jillian Armenanteb. 1968USAmerican actress
- Gillian Flynnb. 1971USAmerican author and critic
- Gillian Vigmanb. 1972USAmerican actress
- Gillian Chungb. 1981CNHong Kong actress and singer
- Gillian Jacobsb. 1982USAmerican film, theater and television actress
- Jillian Bellb. 1984USAmerican actress and comedian
- Banksb. 1988USnot in their usual nameAmerican singer (born 1988)
The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).
How to address them(machine-generated)
A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.
Evidence(measured from records)
Attested in 59 sources across 35 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 79K | #670 |
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 183 | #670 |
| US United States | SSA — National Baby Names (1880–present) | 2025 | 177 | — |
| AU Australia | NSW BDM — Popular baby names (1952–present) | 1955 | 90 | #87 |
| GY Guyana | Guyana — Official List of Electors July 2025 | 2025 | 79 | #515 |
| NZ New Zealand | DIA — Baby name popularity (1900–present) | 1987 | 12 | — |
| US United States | SSA — National Baby Names (1880–present) | 2009 | 5 | — |
| GB United Kingdom | NRS — Baby names Scotland full list (1974–present) | 2002 | 5 | #459 |
| GB United Kingdom | NISRA — Baby names Northern Ireland full list (1997–present) | 1999 | 3 | #344 |
| AU Australia | Australian national given names (aggregated state BDM) | 1989 | 3 | — |
| AU Australia | AU state BDM — consolidated top baby names (NSW + SA + QLD) | 2015 | 1 | — |
| AU Australia | SA BDM — Popular baby names South Australia (1944–present) | 2015 | 1 | — |
Reference works 4
- Nişanyan Adlar (Turkish given-name national-registry frequency)
- Wikipedia given-name tokens
- Wikipedia surname tokens
- Wikidata name items (native-script + romanized given/family names)
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name Jillian mean, and where does it come from?
- English form related to Gillian/Julian, from Latin Iulianus. Recorded by Dictionnaire généalogique des prénoms.
- What are other forms of the name Jillian?
- In the etymology graph, Julia, Juliana and Gillian are forms of the same name in other languages.
- How common is the name Jillian?
- In the United States, the national register counted 78,761 people named Jillian in 2020, about 1 in 4.2 thousand residents.
- How common is Jillian compared with other names?
- In the United States, Jillian is the 697th most common given name of 2,815,431 given names recorded there.
- Is Jillian a male or female name?
- Jillian is a female name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
- In which country does Jillian have the most bearers?
- In the United States, the national register counted about 79 thousand people named Jillian, more than in any other country we hold, where it is most often spelled jillian.
- Where is Jillian most common?
- Jillian is densest in the United States, where the national register counts about 1 in 4.2 thousand people carrying it.
- How do you pronounce Jillian?
- A machine transcription gives /ˈdʒɪɫiən/ (IPA) for English.
What do you want to know about Jillian?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/jillianThe payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.
About this data
measured from records inferred from the name graph machine-generated
These figures come from the data snapshot of and will change as it is rebuilt.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “Jillian” — the 697th most common given name in United States. Data snapshot 2026-10-10.