Isaias

given name · Latin script

Meaning: The prophet Isaiah

Recorded as a male name· opposite-gender records fall within measured source noise

/isaias/(machine-generated) pronunciation, model-generated

Isaias is a given name written in the Latin script, with more bearers in Brazil than in any other country.

rarermore common
  • PYParaguay≈1 in 1.9K(inferred from the name graph)
  • ECEcuador1 in 2.1K
  • SVEl Salvador≈1 in 2.2K

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 (measured from records)

77,888 people, 2022

2 (measured from records)

recorded for this name

Sources
296 (measured from records)

Highest-authority source

≈1 in 1.9K (inferred from the name graph)

Panama, est.

measured from records inferred from the name graph

Name dossier (print, CSV)

Spellings & scripts(measured from records)

IsaiasLatin(measured from records)
ΗσαΐαςGreek(measured from records)

One other spelling is counted as the same name:

Locally spelled Isaías in PA Panama, GT Guatemala.

Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.

Meaning & origin(measured from records)

The prophet Isaiah.

Sources 1

  • kaikki.org Wiktionary extract (IPA + transliterations)

Attested across 16 languages in the etymology graph.

Often considered alongside

Names that people choosing a name often weigh against Isaias, most often first. They share a style rather than an origin.

From the names suggested together in public name-advice forums, in English. A list of what people consider, not a measure of how common any name is.

Where in the world(measured from records)

Isaias 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.

Where Isaias is recorded, by country
CountryMost common spellingSources
BR Brazil#39277,8881 in 2.7K79KIsaias146
US United States—19,2281 in 17K19KIsaias296
PE Peru#374≈14,000 est.≈1 in 2.3K—Isaias61
AR Argentina#371≈13,000 est.≈1 in 3.5K1.9KIsaias79
GT Guatemala—≈8,400 est.≈1 in 2K—Isaías32
EC Ecuador#2938,0551 in 2.1K8.1KIsaias42
PY Paraguay#176≈3,800 est.≈1 in 1.9K—Isaias34
SV El Salvador#180≈3,000 est.≈1 in 2.2K—Isaias30
PA Panama#732≈2,100 est.≈1 in 1.9K11Isaías35

77,888 people counted by IBGE — names by decade (Kaggle mirror), 2022. 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: RENAPER — Nombres de nacimientos (2012–present); IBGE — names by decade (Kaggle mirror); IBGE — Nomes (census name API); Census Bureau — First Name Frequency 2020 by sex; INEC — civil registry names; Tribunal Electoral — Boletín, postulaciones for the 5 May 2024 general election. 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 names spelled this way(inferred from the name graph)

Isaias is also recorded as 4 other names, grouped separately because the records behind them do not connect to the one described above.

  • a separate name2 spellings in the group

    Also written Isaías

  • French given name4 spellings in the group

    Most recorded in France, Peru, United States, Philippines

    Also written Isaïas, Isaías

  • Russian given name9 spellings in the group

    Most recorded in Peru, United States, Russia, Ukraine

    Languages: Russian, Ukrainian, Belarusian

    Also written Исаиас, Isaías, Исайас

  • Korean given name2 spellings in the group

    Most recorded in United States, Malaysia

    Also written Isaías

43 further groups record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Other recorded senses(measured from records)

Isaias is also recorded in 3 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.

  • In German, alternative form of Jesaja (“the biblical character Isaiah”)

    as a wordkaikki.org Wiktionary extract (IPA + transliterations)

  • In Latin, alternative spelling of Ēsāiās

    as a wordkaikki.org Wiktionary extract (IPA + transliterations)

  • In kne, Isaiah (book of the Bible)

    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)

1850190019502000Isaias de Noronha, b. 1874Isaías Medina Angarita, b. 1897Isaias Pleci, b. 1907Isaias Afwerki, b. 1946Isaías Samakuva, b. 1946Raúl Isaías Baduel, b. 1955Isaías Marques Soares, b. 1963Isaias Matiaba, b. 1983Isaías Sánchez, b. 1987Sech, b. 1993

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).

How to address them(machine-generated)

InformalHola Isaias,Hi Isaias, (English)

A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.

Evidence(measured from records)

Attested in 59 sources across 31 countries.

Official registers attesting Isaias
CountryRegisterYearCountRank
BR BrazilIBGE — Nomes (census name API)—79K#557
BR BrazilIBGE — names by decade (Kaggle mirror)202278K—
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—77K#394
US United StatesCensus Bureau — First Name Frequency 2020 by sex202019K#1,640
EC EcuadorINEC — civil registry names20248.1K#222
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)20203.5K—
AR ArgentinaRENAPER — Nombres de nacimientos (2012–present)20241.9K#77
US United StatesSSA — National Baby Names (1880–present)2025755—
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—444#394
EC EcuadorINEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024)2024353—
AR Argentinadatos.gob.ar — nombres.datos.gob.ar per-name lookup (1922–2015)2015139—
AR ArgentinaRENAPER — births 1922–2015 (Kaggle mirror)2015139—

Reference works 3

  • Wikipedia given-name tokens
  • Wikidata name items (native-script + romanized given/family names)
  • Ethiopian name tokens (GitHub lehagere/ethiopian-names, 40/60 condominium list)

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 are other forms of the name Isaias?
In the etymology graph, Isaiah, Isiah and Shai are forms of the same name in other languages.
How do you pronounce Isaias?
A machine transcription gives /isaias/ (IPA) for Spanish.
What does the name Isaias mean, and where does it come from?
The prophet Isaiah. Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
Is Isaias a male or female name?
Isaias is a male name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
In which country does Isaias have the most bearers?
In Brazil, the national register counted about 78 thousand people named Isaias, more than in any other country we hold, where it is most often spelled isaias.
How common is the name Isaias?
In Brazil, the national register counted 77,888 people named Isaias in 2022, about 1 in 2.7 thousand residents.
How common is Isaias compared with other names?
In Brazil, Isaias is the 392nd most common given name of 474,894 given names recorded there.

What do you want to know about Isaias?

Nobody replies to these one by one, but what readers ask decides what these pages answer next.

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Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/isaias

The 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, “Isaias” — the 392nd most common given name in Brazil. Data snapshot 2026-10-10.

See how Isaias parses inside a full name →