Siobhan

given name · Latin script

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

Siobhan is a given name written in the Latin script, with more bearers in the United Kingdom than in any other country. Recorded meaning: Irish form of Joan; introduced by the Anglo-Normans and now very popular in Ireland.

rarermore common
  • IEIreland≈1 in 1.2K(inferred from the name graph)
  • GBUnited Kingdom≈1 in 5.8K
  • AUAustralia≈1 in 6.2K

carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.

United Kingdom (inferred from the name graph)

≈11,000 people, est.

Sources
401 (measured from records)

Highest-authority source

≈1 in 1.2K (inferred from the name graph)

Ireland, est.

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin(measured from records)

Irish form of Joan; introduced by the Anglo-Normans and now very popular in Ireland.

Sources 1

  • Irish first names

Attested across 27 languages in the etymology graph.

Where in the world(measured from records)

Siobhan 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 Siobhan is recorded, by country
CountryMost common spellingSources
GB United Kingdom#541≈11,000 est.≈1 in 5.8K4Siobhan253
US United States—7,2081 in 46K7.2KSiobhan401
IE Ireland#108≈4,400 est.≈1 in 1.2K10Siobhan146
AU Australia#678≈4,100 est.≈1 in 6.2K3Siobhan194
CA Canada—≈1,200 est.≈1 in 31K2Siobhan173
NZ New Zealand#564≈400 est.≈1 in 12K11Siobhan99

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; NISRA — Baby names Northern Ireland full list (1997–present); Australian national given names (aggregated state BDM); CSO — Irish Babies Names (1998–present); Alberta Open Government — Frequency and Ranking of Baby Names by Year and Gender; DIA — Baby name popularity (1900–present). 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)

Siobhan is also recorded as 5 other names, grouped separately because the records behind them do not connect to the one described above.

  • a separate name6 spellings in the group

    Also written Sióbhan, Síobhán, Síobhan, Siobhán, Siobhàn

  • Italian given name2 spellings in the group

    Most recorded in United Kingdom, United States, Ireland, Canada

    Also written Siobhán

  • Russian given name12 spellings in the group

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

    Languages: Russian, Ukrainian, Belarusian

    Also written Shivan, Шиван, Шивон, Siobhán, Шыван

  • Croatian given name10 spellings in the group

    Most recorded in United Kingdom, United States, Croatia, Ireland

    Languages: Croatian, Bulgarian, Serbian

    Also written Siobhán

  • Finnish given name3 spellings in the group

    Most recorded in United Kingdom, United States, Ireland

    Languages: Finnish, Estonian

    Also written Siobhán

45 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.

Other recorded senses(measured from records)

Siobhan 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.

  • The Irish form of Joan (which is sometimes rather sloppily rendered Siun in Irish), a name which was introduced into lreland by the Anglo-Normans. Siobhan has been anglicised as Judith and Julia. \ts popularity has increased greatly since the mid- wentieth century. The actress Siobhan MacKenna is a modern 2xample.

    as a nameIrish first 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)

1940196019802000Siobhan Redmond, b. 1959Siobhan Fallon Hogan, b. 1961Siobhan O'Sullivan, b. 1974Siobhan Hayes, b. 1975Siobhan Vivian, b. 1979Siobhan Chamberlain, b. 1983Siobhan Hewlett, b. 1983Siobhan Dillon, b. 1984Siobhan Williams, b. 1992Siobhán Owen, b. 1993

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).

Evidence(measured from records)

Attested in 45 sources across 28 countries.

Official registers attesting Siobhan
CountryRegisterYearCountRank
US United StatesCensus Bureau — First Name Frequency 2020 by sex20207.2K#3,068
US United StatesSSA — National Baby Names (1880–present)202590—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199557—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199353—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199253—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199752—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199142—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199840—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199438—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199637—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)199933—
CA CanadaStatistics Canada — First names at birth by sex at birth (Table 17-10-0147-01)200131—

Reference works 3

  • Dictionary of American Family Names
  • Wikipedia given-name 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 Siobhan mean, and where does it come from?
Irish form of Joan; introduced by the Anglo-Normans and now very popular in Ireland. Recorded by Irish first names.
Is Siobhan a male or female name?
Siobhan 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.
What are other forms of the name Siobhan?
In the etymology graph, Yvonne, Shavonne and Shevon are forms of the same name in other languages.
In which country does Siobhan have the most bearers?
Mondonomo estimates about 11 thousand people named Siobhan in the United Kingdom, more than in any other country we hold, where it is most often spelled siobhan.
How common is the name Siobhan?
In the United States, the national register counted 7,208 people named Siobhan in 2020, about 1 in 46 thousand residents.
How common is Siobhan compared with other names?
In the United Kingdom, Siobhan is the 541st most common given name of 404,737 given names recorded there.

What do you want to know about Siobhan?

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Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/siobhan

The same payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. Rate-limited for casual use; a free API key gives 1,000 requests a day, and bulk access is licensed separately.

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, “Siobhan” — the 541st most common given name in United Kingdom. Data snapshot 2026-10-10.

See how Siobhan parses inside a full name →