Cillian
boy name#507 in 2025Cillian entered the US charts in 1995, peaked at #463 in 2024, ranks #507 today — a fast riser climbing the charts.
Popularity 1995–2025
#507
rank today
#463
peak (2024)
595
babies in 2025
rising
a fast riser climbing the charts
Rank by decade
| Decade | Average rank |
|---|---|
| 1990s | #9390 |
| 2000s | #5017 |
| 2010s | #1569 |
| 2020s | #667 |
Strongest states
Over the last decade, Cillian has been most popular in NY, CA, TX.
Living bearers
About 4,100 people named Cillian are estimated to be alive in the US today.
The typical Cillian is a kid of about 3 — this name's wave is very recent.
Estimated from official SSA birth records and life tables.
Names similar in popularity
Frequently asked questions
- How popular is the name Cillian in 2025?
- Cillian ranks #507 among US boy names in 2025, with 595 babies given the name.
- When was the name Cillian most popular?
- Cillian peaked in 2024, reaching #463 among US boy names.
- Will my child share the name Cillian with classmates?
- Cillian will almost certainly be the only one in school.
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