Theodosius vs Theo

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

Name A

Theodosius

Boy name

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Name B

Theo

Boy name · Rank #80

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Which name is more popular?

Metric Theodosius Theo
Current Rank Unranked #80
Total Births (all years) 10 35,830
Peak Year 2025 2023
Peak Year Births 10 4,140
Peak Decade 2020ss 2020ss
Gender Boy Boy
First Recorded Year 2025 1880

Births by Decade

Decade Theodosius Theo
1880ss — 93
1890ss — 118
1900ss — 226
1910ss — 714
1920ss — 980
1930ss — 680
1940ss — 440
1950ss — 371
1960ss — 323
1970ss — 386
1980ss — 540
1990ss — 600
2000ss — 1,386
2010ss — 8,189
2020ss 10 20,784

Recent Annual Births (2014–present)

Year Theodosius Theo
2014 — 550
2015 — 765
2016 — 952
2017 — 1,232
2018 — 1,554
2019 — 2,018
2020 — 2,225
2021 — 2,703
2022 — 3,642
2023 — 4,140
2024 — 4,129
2025 10 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, 2025–2025.

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