Lilley

surname · Latin script

Meaning: A placename:

Recorded as a female name· opposite-gender records fall within measured source noise

/ˈɫɪɫi/(machine-generated) pronunciation, model-generated

Lilley is a surname written in the Latin script, with more bearers in the United States than in any other country. In Ireland it is the 46th most common surname.

rarermore common
  • IEIreland≈1 in 1.3Kas Reilly(inferred from the name graph)
  • USUnited States1 in 2.5Kas Riley
  • JMJamaica≈1 in 3.8Kas Reilly

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 Lilley 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)

133,872 named Riley, 2010

2 (measured from records)

recorded for this name

Sources
496 (measured from records)

Highest-authority source

≈1 in 1.3K (inferred from the name graph)

Ireland, est., as Reilly

measured from records inferred from the name graph

Name dossier (print, CSV)

Spellings & scripts(measured from records)

ReillyLatin(measured from records)
릴레이Hangul(measured from records)

Locally spelled Reilly in US United States, GB United Kingdom, AU Australia and 5 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)

A placename:

Sources 1

  • kaikki.org Wiktionary extract (IPA + transliterations)

Attested in 1 language in the etymology graph.

Where in the world(measured from records)

Lilley 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.

Where Lilley is recorded, by country
CountryMost common spellingSources
US United States#510133,872as Riley1 in 2.5K134KReilly496
GB United Kingdom#255≈17,000 est.≈1 in 3.9K685Reilly256
EG Egypt—≈8,400 est.≈1 in 12K—Reilly9
ID Indonesia—≈6,500 est.≈1 in 41K—Reilly21
AU Australia#326≈5,500 est.≈1 in 4.6K354Reilly195
IE Ireland#46≈4,000 est.≈1 in 1.3K—Reilly152
JM Jamaica#146≈740 est.≈1 in 3.8K—Reilly2
IS Iceland#480≈130 est.≈1 in 2.6K5Reilly5

133,872 people counted by Census Bureau — Surname Frequency 2010, 2010, counting the spelling riley. 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 — Surname Frequency 2010; ONS — Baby names England and Wales (2024); Australian national given names (aggregated state BDM); Þjóðskrá Íslands — Name frequencies (NafnTíðni, registry). 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 names spelled this way(inferred from the name graph)

Lilley is also recorded as 2 other names, grouped separately because the records behind them do not connect to the one described above.

  • Spanish surname5 spellings in the group

    Most recorded in United States, United Kingdom, Argentina, Spain

    Languages: Spanish, Portuguese

    Also written Lîllêy, Lïllëÿ

  • Russian surname7 spellings in the group

    Most recorded in United States, United Kingdom, Russia, Ukraine

    Languages: Russian, Ukrainian

    Also written Лиллей, Lillei, Лиллеи

41 further groups record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Notable people with this name(measured from records)

190019201940196019802000Joseph J. Lilley, b. 1913Valerie Lilley, b. 1939Peter Lilley, b. 1943Kristina Lilley, b. 1963Chris Lilley, b. 1974Derek Lilley, b. 1974David Lilley, b. 1975Jen Lilley, b. 1984Ashley Lilley, b. 1986Taylor Lilley, b. 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)

FormalDear Lilley,
InformalHello,

Evidence(measured from records)

Attested in 32 sources across 15 countries.

Official registers attesting Lilley
CountryRegisterYearCountRank
US United StatesCensus Bureau — Surname Frequency 201020107.8K#4,557
US United StatesCensus Bureau — Surname Frequency 200020007.6K#4,332
US United StatesCensus Bureau — Surname Frequency 202020207.5K#4,571
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

Reference works 6

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 Lilley mean, and where does it come from?
A placename: Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
How do you pronounce Lilley?
A machine transcription gives /ˈɫɪɫi/ (IPA) for English.
In which country does Lilley have the most bearers?
In the United States, the national register counted about 134 thousand people named Riley, more than in any other country we hold.
How common is the name Lilley?
In the United States, the national register counted 133,872 people named Riley in 2010, about 1 in 2.5 thousand residents.
How common is Lilley compared with other names?
In the United States, Lilley is the 510th most common surname of 6,282,806 surnames recorded there.

What do you want to know about Lilley?

Nobody replies to these one by one, but what readers ask decides what these pages answer next.

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Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/lilley

The 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, “Lilley” — the 510th most common surname in United States. Data snapshot 2026-10-10.

See how Lilley parses inside a full name →