Jr

surname · Latin script

Meaning: A title used after a son's name when his father has the same name

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

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

Jr is a surname written in the Latin script, with more bearers in Brazil than in any other country. In Heard & McDonald Islands it is the most common surname.

rarermore common
  • BRBrazil1 in 5.3K(measured from records)
  • THThailand≈1 in 14K
  • CACanada≈1 in 38K

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)

40,242 people

#219 (measured from records)

of 19M surnames

Sources
530 (measured from records)

Highest-authority source

1 in 5.3K (inferred from the name graph)

Brazil

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin(measured from records)

A title used after a son's name when his father has the same name.

Sources 1

  • kaikki.org Wiktionary extract (IPA + transliterations)

Attested across 4 languages in the etymology graph.

Where in the world(measured from records)

Jr 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 Jr is recorded, by country
CountryMost common spellingSources
BR Brazil#55440,2421 in 5.3K40KJr178
TH Thailand—≈4,900 est.≈1 in 14K—Jr35
US United States#39≈4,500 est.≈1 in 74K1.3KJr530
IN India—≈2,900 est.≈1 in 464K—Jr75
CA Canada#423≈1,000 est.≈1 in 38K1Jr160
SA Saudi Arabia—≈600 est.≈1 in 57K—Jr47
AE United Arab Emirates#733≈330 est.≈1 in 30K—Jr55
HM Heard & McDonald Islands#1———Jr1

40,242 people counted by IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname). 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: Census Bureau — Surname Frequency 2000; IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); Alberta Open Government — Frequency and Ranking of Baby Names by Year and Gender. 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)

Jr is also recorded as 5 other names, grouped separately because the records behind them do not connect to the one described above.

  • Indonesian surname7 spellings in the group

    Most recorded in Philippines, Indonesia, United States, Malaysia

    Languages: Indonesian, Malay

    Also written J-R, Jř, Jr', Jŕ

  • a separate name3 spellings in the group

    Also written J-R

  • Czech surname7 spellings in the group

    Most recorded in United States, Czechia, Philippines, United Kingdom

    Also written Jř, Jŕ, Ĵr, Ĵř, Jṝ

  • Hindi surname7 spellings in the group

    Most recorded in Philippines, United States, India, United Kingdom

    Languages: Hindi, Urdu

    Also written J-R, Jř, Jŕ

  • Japanese surname2 spellings in the group

    Most recorded in Japan, Philippines, United States, India

    Also written J-R

88 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)

Jr 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 egy, Sentence-initial form of r (“regarding, with respect to, if”)

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

  • In Japanese, Japan Railways

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

  • In wuu, Eeligion (three)

    as a wordA Vocabulary of the Shanghai Dialect

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.

How to address them(machine-generated)

FormalDear Colleague,
InformalHello,

Evidence(measured from records)

Attested in 29 sources across 20 countries.

Official registers attesting Jr
CountryRegisterYearCountRank
BR BrazilIBGE — Nomes (census name API)—425#15,831
US United StatesSSA — National Baby Names (1880–present)198943—
BR BrazilIBGE — names by decade (Kaggle mirror)202242—
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—42#74,979
US United StatesSSA — National Baby Names (1880–present)201738—
US United StatesSSA — National Baby Names (1880–present)200735—
US United StatesSSA — National Baby Names (1880–present)200534—
US United StatesSSA — National Baby Names (1880–present)200434—
US United StatesSSA — National Baby Names (1880–present)200633—
US United StatesSSA — National Baby Names (1880–present)200333—
US United StatesSSA — National Baby Names (1880–present)200233—
US United StatesSSA — National Baby Names (1880–present)201332—

Register rows as of the 2026-10-09 data build.

Frequently asked questions

What does the name Jr mean, and where does it come from?
A title used after a son's name when his father has the same name. Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
How do you pronounce Jr?
A machine transcription gives /ˈdʒunjɝ/ (IPA) for English.
In which country does Jr have the most bearers?
In Brazil, the national register counted about 40 thousand people named Jr, more than in any other country we hold, where it is most often spelled jr.
Where is Jr most common?
Jr is densest in Brazil, where the national register counts about 1 in 5.3 thousand people carrying it.
How common is the name Jr?
In Brazil, the national register counted 40,242 people named Jr, about 1 in 5.3 thousand residents.
How common is Jr compared with other names?
In Brazil, Jr is the 554th most common surname of 424,864 surnames recorded there.

What do you want to know about Jr?

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

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, “Jr” — the 554th most common surname in Brazil. Data snapshot 2026-10-10.

See how Jr parses inside a full name →