Theodorus

#13,685 in 2025Boys' name

God + gift

Theodorus has been given to 35 babies in the U.S. since 2020. In 2025 it ranked #13,685 of 13,926 boys’ names in use. Its peak year was 2024, with 14 recorded.

Babies named Theodorus, 2025

1 in 663,000

Theodorus over time, 1880–2025

Boys

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Theodorus: meaning, origin, and history

God + gift

Deeper origin not confirmed in the cited records

What Theodorus means

Theodorus means “god + gift”, associated with θεός and δῶρον.

Origin, language, and formation

Theodorus is used in Latin.

Theodorus comes through Ancient Greek Θεόδωρος.

Related names and everyday forms

Related names include Theodore.

Pronunciation and spelling

In Latin, Theodorus is pronounced [tʰe.ɔˈdoː.rʊs].

American usage and historical context

In the United States, 35 boys were recorded with the name Theodorus between 2020 and 2025. Its highest annual count was 14 in 2024; its best national rank was #6,431 in 2024.

Over 5 years its rank fell, from #10,484 in 2020 to #13,685 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Theodorus?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025: 1 in 663,000; 5 of 3,315,165 births
Among boys only: 1 in 342,000; <0.01% of boys
Rank, 2025: #13,685; of 13,926 boys’ names in use
Coin-flip room size: 459,581 kids; Even odds of a second one

Where Theodorus sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%

Class of 30Under 1%

Grade of 100Under 1%

School of 500Under 1%

Put another way: gather 459,581 children born in 2025 and it's an even bet that one of them is another Theodorus. In a class of 30 the chance is Under 1%.

When Theodoruss were born

Half of everyone ever recorded as Theodorus was born before 2024 — so the typical Theodorus is around 1 today.

Median birth year: 2024; About 1 years old
Biggest decade: 2020s; 100.0% of all use
Born in the last 25 years: 100.0%; A modern name
Recorded since 1950: 35; People you could plausibly meet

Choose a decade

2020s — 100.0% of all recorded uses (35).

Is Theodorus rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago: −7,254; Places dropped
Rank vs 5 years ago: −3,201; Places dropped
Rank vs 10 years ago: —; Not ranked then
Births vs 10 years ago: —; Not published both years
Share of its own peak: 35.7%; Peak was 2024 (14)
Years since peak: 1; Years
Year-to-year steadiness: Volatile; 46.4% average annual change
Best rank ever: #6,431; 2024

Spellings of Theodorus

Theodorus is not the most common spelling — Theodore is, with 99.1% against Theodorus's 0.01%.

Theodore99.1%317,206
Theodor0.69%2,216
Theodoros0.17%557
Theodorus0.01%35

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Theodorus around the world

Where Theodorus ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

England & Wales
2023–2025
#5,137
in 2025
France
1956–1956
#1,153
in 1956
South Australia
1954–1975
#460
in 1975

Popularity data from Office for National Statistics, Institut national de la statistique et des études économiques and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. CBS SA data under CC BY 4.0.

Theodorus by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025: #13,685
Trend vs 5 yrs ago: Down 3,201
Best rank ever: #6,431; 2024
Peak year: 2024; 14 that year
First recorded: 2020
Last recorded: 2025
All-time count: 35
Count in 2025: 5

Names similar to Theodorus

Matched on shared beginnings and endings, similar length, and comparable popularity.

Sibling names for Theodorus

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

For a sister

Annabell Abagail Shyann Halie Sydni Leonor Sydnie Karleigh

For a brother

Aaden Kale Evans Hamilton Caesar Brennen Jerimiah Jorden

Explore around Theodorus

Top names of 2024, Theodorus's peak year The 2020s in full Other names that peaked in 2024 Boys' names starting with T Theodore Variations & Nicknames