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Theodore vs Theodoros

American parents have registered 318,175 Theodores since 1880, against 557 Theodoroses. Theodore is still ahead, with 13,362 babies in 2025.

Babies given each name, 1880–2025

Births per year: Theodore against Theodoros, 1880 to 2025 0 4k 8k 12k 16k 1880 1900 1920 1940 1960 1980 2000 2020

Theodore Theodoros

Each line is every baby given the name that year, girls and boys added together — the only count that means the same thing for both names. A line breaks where the name fell below five babies in a year — the point at which the SSA stops publishing it — rather than being drawn through a figure nobody published. A single published year in a gap shows as a dot.

Who was ahead

Theodore has been the commoner name in every year either was published, 1880 to 2025. The lead has never changed hands.

The closest they came was 2003, when Theodore had 964 and Theodoros had 13.

Side by side

  Theodore Theodoros
Total US births 318,175557
Most in one year 13,36229
Babies in 2025 13,36229
Estimated living today 202,000540
Median age today 1317
Peak year 20252024
Best rank 4th boys3,793rd boys
Rank in 2025 4th3,757th
First recorded 18801967
Girls / boys 969 / 317,2060 / 557

A rank is a position within one sex’s list for one year, so the two rank rows are not subtracted from one another and the winning column is not marked on them. The living figure is a life-table estimate, not a count.

Which name is older

Half of the Theodoroses alive today are over 17; half the Theodores are over 13. That is 4 years between them: two names in use at the same time, worn by two different generations.

Where each one is strongest

How much commoner the name is in that state than it is nationally, from births recorded since 1910.

Both names abroad

Countries whose statistics office publishes both names, so the comparison can be made somewhere other than the United States.

Country Theodore Theodoros
England and Wales 32,849195
Switzerland 429 Théodore24
Poland 1499

Every spelling a country files separately is added together, over whatever years that country publishes — which is not the same range in any two of them, so read the columns against each other and not the rows.

Compare something else

Related comparisons

Social Security Administration birth records, 1880–2025, public domain. Full histories: Theodore and Theodoros.