Cillian: Statistics About The Baby Name Cillian
| Year | Boy Rank | # Boys | % Boys | Girl Rank | # Girls | % Girls |
| 2023 | 593 | 476 | 0.0260% | * | * | * |
| 2022 | 736 | 349 | 0.0187% | * | * | * |
| 2021 | 743 | 340 | 0.0183% | * | * | * |
| 2020 | 958 | 226 | 0.0123% | * | * | * |
| * No data shown indicates the name was not among the top 1000 most popular names for that year. | ||||||