McIlwain

surname · Latin script

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

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

McIlwain is a surname written in the Latin script, most frequently recorded in the United States. Recorded meaning: Variant of McElwain.

rarermore common
  • AUAustralia
  • GBUnited Kingdom
  • USUnited States

Where the name is found, darker where our sources hold more of it. No national register counts its bearers anywhere we hold data, so the map carries no figures. One hue, darker where it is more common; hover a country for its figure.

Meaning & origin(measured from records)

Variant of McElwain.

Sources 2

  • The Oxford Dictionary of Family Names in Britain and Ireland
  • Wiktionary

Attested in 1 language in the etymology graph.

Where in the world(measured from records)

Recorded in:

No national register we accept counts this name’s bearers, so the page lists where it is found and publishes no figure.

Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).

Notable people with this name(measured from records)

1850190019502000Charles Howard McIlwain, b. 1871Henry McIlwain, b. 1912Charles Eric Maine, b. 1921Stover McIlwain, b. 1939Charlton McIlwain, b. 1971Dallas McIlwain, b. 1982Kamaal McIlwain, b. 1988Alfie McIlwain, b. 1998Brandon McIlwain, b. 1998Lusine, b. 2000

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 Mcilwain,
InformalHello,

Evidence(measured from records)

Attested in 9 sources across 3 countries.

Official registers attesting McIlwain
CountryRegisterYearCountRank
US United StatesCensus Bureau — Surname Frequency 201020103K#10,657
US United StatesCensus Bureau — Surname Frequency 200020002.9K#10,327
US United StatesCensus Bureau — Surname Frequency 202020202.8K#10,736
ES SpainINE — Padrón per-token widgets (current living counts, given + apellidos)—13#105,312
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

Reference works 3

  • The Oxford Dictionary of Family Names in Britain and Ireland
  • 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 McIlwain mean, and where does it come from?
Variant of McElwain. Recorded by The Oxford Dictionary of Family Names in Britain and Ireland and Wiktionary.
How do you pronounce McIlwain?
A machine transcription gives /ˈmæˌkɪɫˌweɪn/ (IPA) for English.
In which country does McIlwain have the most bearers?
McIlwain is most frequently recorded in the United States.

What do you want to know about McIlwain?

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

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, “McIlwain”. Data snapshot 2026-10-10.

See how McIlwain parses inside a full name →