Cillian
Killian or Kilian, as a given name, is an Anglicized version of the Irish name Cillian. The name Cillian was borne by several early Irish saints including missionaries to Artois (France) and Franconia (Germany) and the author of the life of St Brigid.
Meaning & Origin of Cillian
What this name means, where it came from, and how it has traveled across cultures.
Killian or Kilian, as a given name, is an Anglicized version of the Irish name Cillian. The name Cillian was borne by several early Irish saints including missionaries to Artois (France) and Franconia (Germany) and the author of the life of St Brigid.
Source: Wikipedia (CC BY-SA 3.0). Read more →
The Story of Cillian
Cillian first appeared in U.S. Social Security Administration records as a baby boy name in 1995, with 5 babies given the name that year. Its peak popularity came in 2026, when 710 Cillians were born — ranking #447 that year. As of 2026, Cillian ranks #447 for baby boys with 710 births, rising sharply (+156% over the past five years). In total, more than 5K Cillians have been born in the U.S. since records began in 1880, spanning the 1990s through the 2020s.
Popularity Over Time
Popularity by State
Names that sound like Cillian
Phonetically similar names — useful when Cillian is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.
Source: Datamuse . Phonetic similarity ranking, not curated.
Frequently Asked Questions about Cillian
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About the name Cillian
Cillian is a boy baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 1995 and has accumulated 5K births in the dataset. Cillian's peak popularity came in 2026 when it ranked #447. Use the chart and map above to compare Cillian's trajectory across years and U.S. states, or browse the related names section to discover similar choices.
Continue exploring
- Top names of 2026 →
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Data sources
- Birth statistics (counts, ranks, years 1880–2026) — U.S. Social Security Administration . Predictions for years not yet released by SSA are computed by Peek a Name from historical trends; we update with official data as soon as it ships.
- Etymology, cultural origins, and related forms — Behind the Name (used under their public API terms).
- Meaning prose and editorial summary — Wikipedia article extracts, licensed under CC BY-SA 3.0 .
- Predicted nationality distribution — Nationalize.io .
- Phonetically similar names — Datamuse .
Peek a Name aggregates and presents the above data for informational purposes. Statistical predictions and external attributions are clearly labelled where shown; we make no guarantee of accuracy beyond what each source provides.