Cillian

boys’ nameAt its peak · modern nameCompare

Cillian is ranked 463rd among boys in 2024 (668 births). Its best rank was 463rd, in 2024.

Rank in 2024: #463up 131 from 2023
Births in 2024: 6680.04% of boys
Peak year: 2024668 births
Best rank: #463in 2024
Since 1995: 3,486people given the name

Babies named Cillian, by year of birthboys

The story in the numbers

3,486 boys have been named Cillian in the United States since 1995, according to Social Security records. The busiest single year was 2024, with 668 births.

It has never been more used than now: its record year is 2024, within the last few years of data.

Half of everyone given the name was born by 2021, and the 2020s alone account for 59%. It has spent 5 of 145 years in the top 1,000.

Rank among boys, year by year

Higher on the chart = more popularrank (gaps = outside the top 1,000)

By decade

Decade	boys named Cillian
1990s	10
2000s	208
2010s	1,204
2020s	2,064

In 2024, its biggest year

Cillian was the 463rd most given boy’s name that year. The top five boys’ names of 2024 were Liam, Noah, Oliver, Theodore and James. See all of 2024.

Names that rose and fell with Cillian

Same sex, most similar popularity curve over 145 years, in five-year steps — the shape of the line, not the size.

Other spellings in the data

What this page does not tell you. The Social Security data records how many babies were given a name, not what the name means or where it comes from — so neither do we. Counts cover people with a Social Security number; names given to fewer than five babies in a year are withheld. More on the data.