Theodore vs Theo

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

Name A

Theodore

Boy name · Rank #4

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Name B

Theo

Boy name · Rank #80

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Which name is more popular?

Metric Theodore Theo
Current Rank #4 #80
Total Births (all years) 317,206 35,830
Peak Year 2025 2023
Peak Year Births 13,355 4,140
Peak Decade 2020s 2020s
Gender Boy Boy
First Recorded Year 1880 1880

Births by Decade

Decade Theodore Theo
1880s 2,176 93
1890s 2,300 118
1900s 6,490 226
1910s 21,106 714
1920s 31,287 980
1930s 24,957 680
1940s 26,249 440
1950s 29,050 371
1960s 21,288 323
1970s 13,567 386
1980s 11,958 540
1990s 10,113 600
2000s 10,556 1,386
2010s 40,530 8,189
2020s 65,579 20,784

Recent Annual Births (2014–present)

Year Theodore Theo
2014 3,228 550
2015 4,155 765
2016 4,910 952
2017 5,973 1,232
2018 7,088 1,554
2019 7,896 2,018
2020 8,638 2,225
2021 9,600 2,703
2022 10,824 3,642
2023 11,093 4,140
2024 12,069 4,129
2025 13,355 3,945

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, 1880–2025.

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