Siân

Siân does not appear in US Social Security baby-name records, which list only names given to at least five babies in a year. There is no popularity curve to chart: a genuinely rare pick.

Births with a Social Security record. Source: U.S. Social Security Administration

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In Austria, 2 boys named Siân were born in 2025, ranked 1,241st among boys that year, spellings that differ only by special characters counted together.
The count never rose above 2 in a year, too few to chart.

Live births in Austria by year of birth, 1984–2025, from Statistik Austria’s first-name statistics; spellings that differ only by special characters are counted together (umlauts stay apart), every name down to a single birth is published, and the count covers babies with Austrian citizenship only until 2009, every baby from 2010, and from 2015 also births abroad to mothers living in Austria. Shares divide by Statistik Austria’s count of live births from 2010, and before that by the file’s own total for the year. Source: Statistik Austria - data.statistik.gv.at (OGDEXT_VORNAMEN_1, updated 2026-07-09)

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In England and Wales, 8 girls named Siân were born in 2025, ranked 3,035th among girls that year.

share of that year’s name registrations

Birth registrations in England and Wales (not the whole UK); exact spellings are counted separately, and any spelling under 3 in a year is withheld at source. Source: Office for National Statistics, baby names in England and Wales

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In Mexico City, there was 1 registration of Siân in 2022.
The count never rose above 4 in a year, too few to chart.

Civil-registry acts in Mexico City by registration year. Counts are lower bounds (names under 6 in a month and borough are removed at source) and count name-instances, not people; compound names are split, so “Maria Jose” counts under each part. 2023, a partial extract through 3 Mar with no cell on record for this name, is excluded. Source: Registro Civil of Mexico City, open data portal, registered given names 2000-2023

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In Spain, 38 residents are named Siân, ranked 18,047th among women, with a mean age of 44.2 years.
In Spain, 20 residents are named Siân, ranked 30,992nd among men, with a mean age of 14.7 years.

Residents of Spain on 1 January 2025. Spain publishes how old a name’s living bearers are, not a birth series, so there is no year chart. Source: INE (Spain), Censo de Población anual, 1 January 2025

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Siân is not on the 2024 record for Argentina, where small counts are withheld at source.
The count never rose above 2 in a year, too few to chart.

Given-name components of births in Argentina 2012–2024; national cells are lower bounds and no sex split is published. Source: RENAPER (Argentina), Dirección Nacional de Población, given names 2012-2024

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Siân is not on the 2024 record for Canada, where names under 5 in a year are excluded at source.
The count never rose above 9 in a year, too few to chart.

First given names from provincial and territorial vital statistics across Canada; any name-sex-year under 5 is excluded at source, and small Quebec counts carry a randomized adjustment made at source. Shares divide by Statistics Canada’s count of live births for the year; the 2024 count is preliminary. Source: Statistics Canada, first names at birth (table 17-10-0147-01)

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Siân is not on the 2025 record for Ireland, where names under 3 in a year are withheld at source.

share of that year’s name registrations

Exact registered spellings from Irish vital statistics; any name under 3 in a year is withheld at source, and accented spellings (fadas) are recorded reliably only from 2018. Source: Central Statistics Office (Ireland), Irish babies' names

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Siân is not on the 2025 record for New Zealand, where names under 10 in a year are excluded at source.

share of that year’s name registrations

First given names from New Zealand birth registrations, grouped by registration year; any name under 10 in a year is excluded at source. Shares divide by Stats NZ’s count of births registered to mothers living in New Zealand, under 1% below the registry’s own count. Source: Department of Internal Affairs (New Zealand), baby name popularity over time

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Siân is not on the 2024 record for Scotland, where spellings under 3 in total are suppressed at source.

share of that year’s name registrations

Births registered in Scotland; different spellings count separately but accents are merged at source, and any spelling under 3 in total is suppressed. Source: National Records of Scotland, babies' first names

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Siân is not on the 2017 record for South Australia, whose registry publishes every name given that year.

share of that year’s name registrations

Births registered in South Australia (not all of Australia) by first name and year of registration, 1944–2017, from the state’s Births, Deaths and Marriages registry, which publishes every name down to a single birth in capitals; a spelling its export repeats inside a year is counted once, and from 2018 only a top 100 is published, so the series ends at 2017. Source: Consumer and Business Services (South Australia), popular baby names

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