Kiernan
surname · Latin script
Meaning: reduced form of McKiernan, an Anglicized form of Gaelic Mac Thighearnain ‘son of Tigheaman' (see Tiernan)
Recorded for both men and women· direction only, no split published
/ˈkɪɹnən/(machine-generated) pronunciation, model-generated
Kiernan is a surname written in the Latin script, with more bearers in the United States than in any other country.
- USUnited States1 in 56K(measured from records)
- NONorway1 in 119K
- ARArgentina1 in 325K
carrying the name, as counted by each country's national register. One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- 2 (measured from records)
- Sources
- 9 (measured from records)
- 1 in 56K (inferred from the name graph)
5,966 people, 2010
recorded for this name
Highest-authority source
United States
measured from records inferred from the name graph
Spellings & scripts(measured from records)
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)
reduced form of McKiernan, an Anglicized form of Gaelic Mac Thighearnain ‘son of Tigheaman' (see Tiernan).
Sources 1
- Dictionary of American Family Names
Where in the world(measured from records)
Kiernan 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.
5,966 people counted by Census Bureau — Surname Frequency 2010, 2010. 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; RENAPER — Apellidos (person counts, national); INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); SSB — Navnesøk (name-search service, living population); Skatteverket — Sök hur många som har ett visst namn (living population); dane.gov.pl — PESEL living persons (surnames). 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)
Kiernan is also recorded in 2 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In English, A different form of McKiernan.
as a nameEncyclopedia of surnames [the complete companion to tracing your names history]
In English, Edward J., labor union official
as a namePronouncing Dictionary of Proper Names
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)
- Francis Kiernanb. 1800IEAnatomist and physician (1800–1874)
- Kitty Kiernanb. 1892IEfiancée of Michael Collins (1892–1945)
- William Kiernanb. 1908USset decorator (1908-1973)
- Ian Kiernanb. 1940AUAustralian environmentalist
- Ben Kiernanb. 1953AUAustralian-born American historian (born 1953)
- Caitlín R. Kiernanb. 1964USwriter
- Pat Kiernanb. 1968USCanadian-American television host
- Denise Kiernanb. 1968USAmerican writer
- Rob Kiernanb. 1991IEIrish footballer
- Brendan Kiernanb. 1992GBEnglish footballer (born 1992)
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)
Evidence(measured from records)
Attested in 28 sources across 15 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 6K | #5,802 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 5.7K | #5,614 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 5.6K | #5,900 |
| AR Argentina | RENAPER — Apellidos (person counts, national) | — | 140 | — |
| ES Spain | INE — Apellidos más frecuentes (Padrón Municipal) | — | 64 | #37,627 |
| ES Spain | INE — Padrón per-token widgets (current living counts, given + apellidos) | — | 64 | #37,368 |
| NO Norway | SSB — Navnesøk (name-search service, living population) | — | 46 | #27,740 |
| SE Sweden | Skatteverket — Sök hur många som har ett visst namn (living population) | — | 16 | #30,089 |
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 10 | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 10 | #134,261 |
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 8 | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 8 | #153,486 |
Reference works 6
- Dictionary of American Family Names
- The Oxford Dictionary of Family Names in Britain and Ireland
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- Wikipedia surname tokens
- Wikidata name items (native-script + romanized given/family names)
- Rymut, Słownik nazwisk współcześnie w Polsce używanych (10 vols, IJP PAN, Kraków 1992–1994) — every Polish surname in the PESEL register at the end of 1990, with bearer counts nationally and per voivodeship1990
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 Kiernan mean, and where does it come from?
- reduced form of McKiernan, an Anglicized form of Gaelic Mac Thighearnain ‘son of Tigheaman' (see Tiernan). Recorded by Dictionary of American Family Names.
- How do you pronounce Kiernan?
- A machine transcription gives /ˈkɪɹnən/ (IPA) for English.
- In which country does Kiernan have the most bearers?
- In the United States, the national register counted about 6.0 thousand people named Kiernan, more than in any other country we hold, where it is most often spelled kiernan.
- Where is Kiernan most common?
- Kiernan is densest in the United States, where the national register counts about 1 in 56 thousand people carrying it.
- How common is the name Kiernan?
- In the United States, the national register counted 5,966 people named Kiernan in 2010, about 1 in 56 thousand residents.
What do you want to know about Kiernan?
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/kiernanThe 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, “Kiernan”. Data snapshot 2026-10-10.