Name meaning & stats
Cillian
Cillian. 4,090 US babies since 1940, peak 2024.
What it means
No agreed meaning on record
In US birth records
Peak year: 2024
4,090 US babies were named Cillian between 1940 and 2025.
Careers
Not enough notable people named Cillian (or its spelling family) to say anything reliable yet. That's a gap in the data, not the name.
Spelling family
The most common spelling: 74% of the family
- Cillian 74%
- Zylan 10%
- Zylen 7%
- Zylon 4%
- Cylan 3%
- Zylin 3%
Names that sound the same, grouped by Heyotag. Share of US babies since 1940.
Name twins (peaked around 2024)