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
Showing
- 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
boys
Rank among boys' names. Cillian has never cracked the top 400 here.
Hover or use arrow keys to read values by year; click or press Enter to open that year.
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 | |
| 2003 | — | — | ||
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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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First appearance
1995
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 2025
- Rank in state
- Top 10
- 11–50
- 51–100
- 101–500
- 501+
- Not published
Hover or tap a state for its numbers.
Top states · boys
- Alaska#165 · 1 in 454
- Rhode Island#200 · 1 in 625
- Delaware#203 · 1 in 589
- New Hampshire#230 · 1 in 901
- New Mexico#270 · 1 in 929
Best ever in a state: #162 in Alaska, 2024.
Show every state
| State | Rank | Births | Share |
|---|---|---|---|
| Alaska | #165 | 5 | 1 in 454 |
| Rhode Island | #200 | 5 | 1 in 625 |
| Delaware | #203 | 5 | 1 in 589 |
| New Hampshire | #230 | 5 | 1 in 901 |
| New Mexico | #270 | 7 | 1 in 929 |
| Massachusetts | #307 | 18 | 1 in 1,501 |
| Virginia | #329 | 25 | 1 in 1,490 |
| New Jersey | #344 | 24 | 1 in 1,657 |
| Colorado | #346 | 18 | 1 in 1,492 |
| New York | #350 | 50 | 1 in 1,688 |
| Ohio | #357 | 31 | 1 in 1,695 |
| Illinois | #363 | 29 | 1 in 1,709 |
| Connecticut | #382 | 7 | 1 in 1,887 |
| Pennsylvania | #397 | 26 | 1 in 2,010 |
| Oregon | #398 | 9 | 1 in 1,673 |
| Washington | #425 | 17 | 1 in 1,929 |
| North Carolina | #431 | 25 | 1 in 2,059 |
| Wisconsin | #484 | 10 | 1 in 2,343 |
| Oklahoma | #504 | 8 | 1 in 2,210 |
| California | #509 | 60 | 1 in 2,925 |
| Minnesota | #511 | 10 | 1 in 2,450 |
| Maryland | #516 | 9 | 1 in 2,544 |
| Missouri | #518 | 11 | 1 in 2,528 |
| Tennessee | #520 | 14 | 1 in 2,626 |
| Mississippi | #522 | 5 | 1 in 2,167 |
| Utah | #561 | 7 | 1 in 2,809 |
| Florida | #585 | 29 | 1 in 3,294 |
| Kansas | #590 | 5 | 1 in 2,809 |
| South Carolina | #608 | 7 | 1 in 3,028 |
| Indiana | #621 | 10 | 1 in 3,166 |
| Arizona | #634 | 10 | 1 in 3,272 |
| Michigan | #768 | 9 | 1 in 4,466 |
| Louisiana | #775 | 5 | 1 in 3,826 |
| Texas | #778 | 35 | 1 in 5,001 |
| Georgia | #919 | 9 | 1 in 5,580 |
| Alabama | — | — | — |
| Arkansas | — | — | — |
| District of Columbia | — | — | — |
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| Wyoming | — | — | — |
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
Momentum · boys
Rising
- 44 spots since 2024 (#463 → #507)
- 450 spots since 2020 (#957 → #507)
- Biggest jump: 210 spots in 2021
- Biggest drop: 44 spots in 2025
Rise & fade · boys
29 yrs to peak
- Debuted 1995
- Peaked 2024 at #463 (668 births)
- Not yet halved from its peak
Top of the charts · boys
Top 1,000 for 6 yrs
- Top 10: never
- Top 100: never
- Top 1,000: 6 yrs · run 2020–2025
Share of babies · boys
1 in 2,579
- 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%)
Era · boys
The 2020s
- 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.
Want to check a specific year?
See where Cillian ranked and which names it was up against. Click a point on the chart, or pick a year: