Killian
Anglicized from Irish Cillian, a pet form built on cill, a church or monastic cell. An Irish missionary of the name worked in Franconia.
Killian in 2025
Killian was given to 785 babies in the United States in 2025, making it the 819th most popular name of the year. That is roughly one in every 4,223 babies born.
The history of Killian
Killian reached its highest point in 2017, when 1,528 babies were given the name, ranking 455th that year.
Across the 111 years of records since 1915, 16,834 babies have been named Killian. Half of them were born before 2017, which places the name's centre of gravity with Generation Alpha.
Killian by decade
| Decade | Babies named Killian | Best rank |
|---|---|---|
| 1910s | 5 | 7,878 |
| 1920s | 5 | 8,981 |
| 1980s | 160 | 3,151 |
| 1990s | 1,258 | 1,862 |
| 2000s | 1,971 | 1,579 |
| 2010s | 8,062 | 455 |
| 2020s | 5,373 | 686 |
Where Killian is heading
Killian has fallen 22% over the past decade, from 1,001 babies in 2015 to 785 in 2025.
Names like Killian
Names that rose and fell at the same time as Killian.