Cillín
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Meaning
a variant of Cillian, an Irish name probably from Old Irish cell, "church", with a diminutive ending
How popular is Cillín around the world?
Cillín has no published row in the national Social Security baby-name files from 1880 through 2025. Those files omit name-and-sex counts below five, so there is no popularity curve to chart and no basis for saying the name was never used. Cillín is not on the 2025 record for Ireland, where names under 3 in a year are withheld at source.
United States
no published row
Cillín has no published row in the national Social Security baby-name files from 1880 through 2025. Those files omit name-and-sex counts below five, so there is no popularity curve to chart and no basis for saying the name was never used.
Births with a Social Security record. Source: U.S. Social Security Administration
Ireland
last on record 2021
Cillín is not on the 2025 record for Ireland, where names under 3 in a year are withheld at source.
The count never rose above 4 in a year, too few to chart.
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. This registry counts each spelling separately; the figures above are for the exact spelling Cillín, and accented spellings are separate names. Source: Central Statistics Office (Ireland), Irish babies' names
Not on 15 other recordsWhy
- Not on the record in Spain, Mexico City, Argentina, Puerto Rico, England and Wales, Canada, New Zealand, Scotland and Poland: those registries withhold small counts, so rare uses may sit below their floors.
- Not on the Chile record: nametree keeps spellings that reached 5 registrations in some year, so rarer uses are not shown.
- Not on the Montevideo record for 1940 to 2011: that registry withholds nothing, so this spelling was not given there in those years.
- Not on the France record: nametree keeps spellings that reached 20 births in some year, so rarer uses are not shown.
- Not on the South Australia record for 1944 to 2017: that registry withholds nothing, so this spelling was not given there in those years.
- Not on the Austria record for 1984 to 2025: Statistik Austria publishes every first name down to a single birth, so this name was not given there in those years (before 2010 the record covers babies with Austrian citizenship only).
- Not on Norway’s list: Statistics Norway lists only first names carried by 200 or more living people, so rarer names are not shown.
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The Cillín deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Cillín truly comes from, how it traveled, and what the published record can and cannot tell us, without inventing a curve. If you have grown a tree on nametree, it also considers how Cillín fits with your family’s names and surname.
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