Total babies named Cillian (all years): 3,492
| Year | Boys (count / rank / %) |
|---|---|
| 2024 | 668 / #463 / 0.039% |
| 2023 | 476 / #594 / 0.028% |
| 2022 | 352 / #737 / 0.020% |
| 2021 | 340 / #749 / 0.019% |
| 2020 | 228 / #957 / 0.013% |
| 2019 | 186 / #1077 / 0.010% |
| 2018 | 193 / #1051 / 0.011% |
| 2017 | 170 / #1126 / 0.009% |
| 2016 | 177 / #1107 / 0.009% |
| 2015 | 121 / #1418 / 0.006% |
| Year | Boys (count / rank / %) |
|---|---|
| 2014 | 87 / #1733 / 0.005% |
| 2013 | 77 / #1853 / 0.004% |
| 2012 | 73 / #1946 / 0.004% |
| 2011 | 66 / #2040 / 0.003% |
| 2010 | 54 / #2358 / 0.003% |
| 2009 | 52 / #2458 / 0.003% |
| 2008 | 51 / #2477 / 0.003% |
| 2007 | 39 / #2982 / 0.002% |
| 2006 | 42 / #2750 / 0.002% |
| 2005 | 10 / #7206 / 0.001% |
| Year | Boys (count / rank / %) |
|---|---|
| 2004 | 8 / #8267 / 0.000% |
| 2001 | 6 / #9466 / 0.000% |
| 1999 | 5 / #10182 / 0.000% |
| 1995 | 5 / #9094 / 0.000% |