Cillian
Last seen for girls in 2024 at #13,477 · #507 for boys in 2025, 595 births
Given to boys 99.9% of the time
- Peak · boys
- 2024 · 668 births
- Debut · boys
- 5 births
- In top 100 · boys
- neverof 146 years
- Total births · boys
- 4,084since 1995
Cillian over time
Rank among boys' names. Cillian has never cracked the top 400 here.
Gaps mean fewer than 5 babies received the name that year, so the SSA doesn't publish it.
Show data table
| Year | girls | boys | ||
|---|---|---|---|---|
| rank | births | rank | births | |
| 2025 | — | #507 | 595 | |
| 2024 | #13,477 | 6 | #463 | 668 |
| 2023 | — | #594 | 477 | |
| 2022 | — | #735 | 353 | |
| 2021 | — | #747 | 341 | |
| 2020 | — | #957 | 228 | |
| 2019 | — | #1,078 | 186 | |
| 2018 | — | #1,052 | 193 | |
| 2017 | — | #1,126 | 170 | |
| 2016 | — | #1,105 | 177 | |
| 2015 | — | #1,416 | 121 | |
| 2014 | — | #1,730 | 87 | |
| 2013 | — | #1,851 | 77 | |
| 2012 | — | #1,942 | 73 | |
| 2011 | — | #2,035 | 66 | |
| 2010 | — | #2,354 | 54 | |
| 2009 | — | #2,451 | 52 | |
| 2008 | — | #2,467 | 51 | |
| 2007 | — | #2,974 | 39 | |
| 2006 | — | #2,744 | 42 | |
| 2005 | — | #7,096 | 10 | |
| 2004 | — | #8,143 | 8 | |
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| 2001 | — | #9,243 | 6 | |
| 2000 | — | — | ||
| 1999 | — | #9,912 | 5 | |
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| 1995 | — | #8,868 | 5 | |
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| 1880 | — | — | ||
The first year at least five boys were named Cillian! It came in at #8,868, and was given to 5 baby boys.
Quietest stretch: 1995–2000, when fewer than 6 boys a year got the name.
Where Cillian is popular in 2021
- Rank in state
- Top 10
- 11–50
- 51–100
- 101–500
- 501+
- Not published
Hover or tap a state for its numbers.
- New Hampshire#236 · 1 in 933
- Massachusetts#278 · 1 in 1,358
- New Jersey#340 · 1 in 1,690
- Connecticut#495 · 1 in 2,795
- Pennsylvania#510 · 1 in 3,081
Best ever in a state: #162 in Alaska, 2024.
Show every state
| State | Rank | Births | Share |
|---|---|---|---|
| New Hampshire | #236 | 5 | 1 in 933 |
| Massachusetts | #278 | 21 | 1 in 1,358 |
| New Jersey | #340 | 24 | 1 in 1,690 |
| Connecticut | #495 | 5 | 1 in 2,795 |
| Pennsylvania | #510 | 18 | 1 in 3,081 |
| Virginia | #539 | 13 | 1 in 3,008 |
| Oregon | #545 | 6 | 1 in 2,650 |
| New York | #551 | 28 | 1 in 3,183 |
| Kansas | #574 | 5 | 1 in 2,761 |
| Washington | #587 | 11 | 1 in 3,036 |
| Colorado | #592 | 8 | 1 in 3,228 |
| Utah | #609 | 6 | 1 in 3,200 |
| Illinois | #617 | 15 | 1 in 3,594 |
| Oklahoma | #619 | 6 | 1 in 2,992 |
| Maryland | #636 | 7 | 1 in 3,564 |
| North Carolina | #695 | 12 | 1 in 4,253 |
| Ohio | #696 | 12 | 1 in 4,518 |
| Indiana | #701 | 8 | 1 in 4,095 |
| California | #792 | 31 | 1 in 6,109 |
| Louisiana | #803 | 5 | 1 in 4,347 |
| Michigan | #819 | 8 | 1 in 5,371 |
| Tennessee | #897 | 6 | 1 in 5,973 |
| Arizona | #909 | 5 | 1 in 6,524 |
| Georgia | #1,056 | 7 | 1 in 7,195 |
| Florida | #1,136 | 10 | 1 in 9,276 |
| Texas | #1,193 | 16 | 1 in 10,695 |
| Alabama | — | — | — |
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Ranks are within each state; “1 in N” is out of the boys born there that year. The SSA only publishes a name in a state when 5 or more babies of one sex got it.
See more about Cillian
- 44 spots since 2024 (#463 → #507)
- 450 spots since 2020 (#957 → #507)
- 909 spots since 2015 (#1,416 → #507)
- Biggest jump: 210 spots in 2021 (#957 → #747)
- Biggest drop: 44 spots in 2025 (#463 → #507)
- Debuted 1995
- Peaked 2024 at #463 (668 births)
- Not yet halved from its peak
- Top 10: never
- Top 100: never
- Top 1,000: 6 yrs · run 2020–2025
- Highest: 1 in 2,579 boys born in 2024 were named Cillian (0.04%)
- Latest: 1 in 2,871 boys born in 2025 (0.03%)
- 65.2% of all boys named Cillian (2,662) were born in this decade
Show by decade
| Decade | Births | Best rank | Avg rank |
|---|---|---|---|
| 1990s | 10 | #8,868 (1995) | #9,390 |
| 2000s | 208 | #2,451 (2009) | #5,017 |
| 2010s | 1,204 | #1,052 (2018) | #1,569 |
| 2020s | 2,662 | #463 (2024) | #667 |
All figures count published births only (names given to at least 5 boys in a year). Registrations before 1937 are incomplete, so early shares and totals run low.
Cillian in 2021
Top boys' names in 2021
More about 2021
boys
1,749,482 boys got a published name in 2021; 1 in 5,130 of them was named Cillian, which outranked 94.7% of the 14,096 boys' names that year. The ten most popular names covered 7.8% of boys (44.2% in 1880, 8.0% in 2025).