Cillian
4 countries#507 in United States, 2025Popularity across 4 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
Northern Ireland
1,694 births recorded 1997–2025 · currently #11 · peaked in 2024 with 142 births
Source: NISRA, 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 |
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