Theodoro
surname · Latin script
Meaning: Pre-reform spelling (used until 1943 in Brazil and 1911 in Portugal) of Teodoro
Recorded as a male name· opposite-gender records fall within measured source noise
Theodoro is a surname written in the Latin script, with more bearers in Brazil than in any other country.
- BRBrazil≈1 in 15K(inferred from the name graph)
- PTPortugal≈1 in 180K
- AOAngola≈1 in 241K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- Brazil (inferred from the name graph)
- Sources
- 139 (measured from records)
- ≈1 in 15K (inferred from the name graph)
≈15,000 people, est.
Highest-authority source
Brazil, est.
measured from records inferred from the name graph
Meaning & origin(measured from records)
Pre-reform spelling (used until 1943 in Brazil and 1911 in Portugal) of Teodoro.
Sources 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Theodoro counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| BR Brazil | #508 | ≈15,000 est. | ≈1 in 15K | 7K | Theodoro | 139 |
| US United States | — | ≈150 est. | ≈1 in 2.2M | 322 | Theodoro | 63 |
| AO Angola | — | ≈140 est. | ≈1 in 241K | — | Theodoro | 8 |
| IT Italy | — | ≈64 est. | ≈1 in 973K | 1 | Theodoro | 9 |
| PT Portugal | — | ≈57 est. | ≈1 in 180K | listed | Theodoro | 15 |
| NL Netherlands | — | ≈23 est. | ≈1 in 744K | 21 | Theodoro | 2 |
| ES Spain | — | 22 | 1 in 2.3M | 22 | Theodoro | 15 |
| PY Paraguay | — | ≈8 est. | ≈1 in 918K | — | Theodoro | 7 |
Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.
Registers cited: IBGE — names by decade (Kaggle mirror); Census Bureau — First Name Frequency 2020 by sex; INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); Meertens NVB — Nederlandse Voornamenbank (all-time BRP bearer counts, 2018); ISTAT — Contanomi newborn per-name series (1999–2024, JSONP backend). Figures without a register are Mondonomo estimates; see Methodology.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).
Other recorded senses(measured from records)
Theodoro is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Latin, dative/ablative singular of Theodorus
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name(measured from records)
- Guilherme de Mellob. 1867BRnot in their usual nameBrazilian musician, music historian (1867-1932)
- Teodoro Valcárcelb. 1900PEnot in their usual namePeruvian composer (1900–1942)
- Theodoro Henrique Maurer Jr.b. 1906BRBrazilian linguist and university teacher (1906-1979)
- Carlos Lessab. 1936BRnot in their usual nameBrazilian economist (1936–2020)
- Theodoro Cochraneb. 1978BRBrazilian actor
The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).
Evidence(measured from records)
Attested in 33 sources across 22 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 16K | #944 |
| ES Spain | INE — Apellidos más frecuentes (Padrón Municipal) | — | 22 | #78,816 |
| ES Spain | INE — Padrón per-token widgets (current living counts, given + apellidos) | — | 22 | #78,058 |
| US United States | wru Name Dictionary — US surnames, voter-file supplement (Khanna et al.) | — | — | — |
Reference works 2
- Dictionary of American Family Names
- Wikidata name items (native-script + romanized given/family names)
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name Theodoro mean, and where does it come from?
- Pre-reform spelling (used until 1943 in Brazil and 1911 in Portugal) of Teodoro. Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- In which country does Theodoro have the most bearers?
- Mondonomo estimates about 15 thousand people named Theodoro in Brazil, more than in any other country we hold, where it is most often spelled theodoro.
- How common is the name Theodoro?
- In Spain, the national register counted 22 people named Theodoro, about 1 in 2.3 million residents.
- How common is Theodoro compared with other names?
- In Brazil, Theodoro is the 508th most common surname of 424,864 surnames recorded there.
What do you want to know about Theodoro?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/theodoroThe payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.
About this data
measured from records inferred from the name graph machine-generated
These figures come from the data snapshot of and will change as it is rebuilt.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “Theodoro” — the 508th most common surname in Brazil. Data snapshot 2026-10-10.