Cillian vs Olivia

Side-by-side comparison of Cillian and Olivia — popularity rank, total births, peak decade, and historical trends from Social Security Administration data.

Name A

Cillian

Boy name · Rank #463

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Name B

Olivia

Girl name · Rank #1

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Which name is more popular?

Metric Cillian Olivia
Current Rank #463 #1
Total Births (all years) 3,486 553,664
Peak Year 2024 2014
Peak Year Births 668 19,836
Peak Decade 2020ss 2010ss
Gender Boy Girl
First Recorded Year 1995 1880

Births by Decade

Decade Cillian Olivia
1880ss — 618
1890ss — 1,099
1900ss — 1,575
1910ss — 3,545
1920ss — 4,982
1930ss — 3,922
1940ss — 7,201
1950ss — 6,100
1960ss — 4,015
1970ss — 7,849
1980ss — 14,061
1990ss 10 75,913
2000ss 208 156,048
2010ss 1,204 184,528
2020ss 2,064 82,208

Recent Annual Births (2014–present)

Year Cillian Olivia
2014 87 19,836
2015 121 19,726
2016 177 19,409
2017 170 18,777
2018 193 18,055
2019 186 18,569
2020 228 17,682
2021 340 17,841
2022 352 16,654
2023 476 15,313
2024 668 14,718

Data Sources

Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications — National Data, ssa.gov/oact/babynames.
Source: SSA Annual Name Rankings, 1995–2024.

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