Cillian
5 countries#507 in United States, 2025Popularity across 5 countries
Each line is scaled to its own peak, so you can compare when Cillian was in fashion in each country, whatever the population size.
Country by country
🇺🇸 United States
4,090 births recorded 1995–2025 · currently #507 · peaked in 2024 with 674 births
Most common in: New York, California, Texas, Massachusetts, Pennsylvania
Source: Social Security Administration, official birth-registration data
🇬🇧 United Kingdom
3,750 births recorded 1996–2025 · currently #38 · peaked in 2018 with 355 births (England & Wales + Scotland + Northern Ireland combined)
Source: ONS, National Records of Scotland & NISRA (combined), official birth-registration data
Northern Ireland
1,694 births recorded 1997–2025 · currently #11 · peaked in 2024 with 142 births
Source: NISRA, official birth-registration data
🏴🏴 England & Wales
1,553 births recorded 1996–2021 · currently #274 · peaked in 2020 with 202 births
Source: Office for National Statistics, official birth-registration data
🏴 Scotland
503 births recorded 2007–2025 · currently #100 · peaked in 2024 with 62 births
Source: National Records of Scotland, official birth-registration data
🇫🇷 France
216 births recorded 1997–2022 · currently #1419 · peaked in 2022 with 24 births
Source: INSEE, official birth-registration data
United States rank history
Cillian’s rank among boys’ names, most recent 20 years on record.
| Year | Rank | vs. prior yr |
|---|---|---|
| 2006 | #2744 | — |
| 2007 | #2974 | ↓230 |
| 2008 | #2467 | ↑507 |
| 2009 | #2451 | ↑16 |
| 2010 | #2354 | ↑97 |
| 2011 | #2035 | ↑319 |
| 2012 | #1942 | ↑93 |
| 2013 | #1851 | ↑91 |
| 2014 | #1730 | ↑121 |
| 2015 | #1416 | ↑314 |
| 2016 | #1105 | ↑311 |
| 2017 | #1126 | ↓21 |
| 2018 | #1052 | ↑74 |
| 2019 | #1078 | ↓26 |
| 2020 | #957 | ↑121 |
| 2021 | #747 | ↑210 |
| 2022 | #735 | ↑12 |
| 2023 | #594 | ↑141 |
| 2024 | #463 | ↑131 |
| 2025 | #507 | ↓44 |
Frequently asked questions about Cillian
Is Cillian a popular name?
Yes — Cillian currently ranks #507 among boys’ names in United States as of 2025, based on official birth records.
Is Cillian more common for boys or girls?
Cillian is recorded predominantly as a boys’ name in official United States birth data.
When was Cillian most popular?
Cillian peaked in 2024 in United States, with 674 recorded births that year.
Is Cillian rising or falling in popularity?
In United States, Cillian’s popularity is rising — its rank has improved from #8868 in 1995 to #507 in 2025.
How many babies have been named Cillian?
At least 8,056 babies have been recorded with the name Cillian across official birth statistics in 5 countries.
Is Cillian popular in more than one country?
Yes — Cillian appears in official birth records in 5 countries: United States, Northern Ireland, England & Wales, Scotland, France.
What names are similar in popularity to Cillian?
Based on real 2025 ranking data in United States, names ranked closest to Cillian include Pierce, Gunner, Johnathan, Kyle.
Similar names right now
Ranked directly next to Cillian in United States, 2025 — a real popularity match, not a subjective list.