Isac

given name · Portuguese · Latin script

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

Isac is a given name, with more bearers in Brazil than in any other country. In Mozambique it is the 25th most common given name. It appears chiefly in Portuguese and English, written in the Latin script. Recorded meaning: Initialism of Idol Star Athletics Championships (Korean biannual Athletics gathering).

rarermore common
  • BRBrazil1 in 3.3K◐
  • HNHonduras1 in 18K
  • MXMexico1 in 27K

carrying the name, one hue, darker where it is more common. Hover a country for its figure.

≈76K ●

across 10 countries

Sources
154 ●

51K records

Official registry-verified

1 in 1.9K ◐

Sweden

Meaning & origin●

Initialism of Idol Star Athletics Championships (Korean biannual Athletics gathering).

Sources 1

  • kaikki.org Wiktionary extract (IPA + transliterations)

Attested across 19 languages in the etymology graph.

Where in the world●

Sorted by bearers counted by national registers, records where none counts.

Where Isac is recorded, by country
CountryMost common spellingSources
BR Brazil#59564,850△13K rec.1 in 3.3K65KIsac141
MX Mexico—11,6026.8K rec.—14Isac92
PE Peru—7,8586.1K rec.——Isac41
AR Argentina—6,0914.7K rec.—98Isac35
SE Sweden—5,477△339 rec.1 in 1.9K5.5KIsac52
US United States—3,39411K rec.1 in 98K3.4KIsac154
HN Honduras#6251,0371K rec.——Isac15
VE Venezuela—645671 rec.——Isac10
FR France—6251.5K rec.1 in 109K625Isac101
PY Paraguay—591348 rec.——Isac9
NO Norway—553△32 rec.1 in 9.9K1.9K—14
CL Chile—450105 rec.—3Isac19

Roughly 65K people in Brazil bear this name (about 1 in 3.3K). Estimates project the name's share of our records onto national population, so each is only as good as the record base beside it — the Basis column gives that base; rows marked △ rest on fewer records than the estimate itself and are order-of-magnitude at best.

Country figures for a list of names, at full precision, are available under licence rather than by scraping this table. How that works.

Languages●

  • Portuguese627K84%
  • English73K10%
  • Spanish33K4%
  • French3.4K1%
  • Norwegian Bokmål1.9K1%
Show as table
Languages in which the name is recorded
NameRecordsNote
Portuguese627,48584%
English72,82910%
Spanish32,6094%
French3,3931%
Norwegian Bokmål1,8941%

Language is read off each record's context, not declared by the bearer; a share is of all records for this spelling.

Other names spelled this way◐

Isac is also recorded as another name, grouped separately because the records behind them do not connect to the one described above.

  • a separate name574 records spelled Isac4 spellings in the group

    Also written ഐസക്, Issac

56 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.

Over time●

050100150190019502000148 · 2006

Show as table
Isac in SSA — National Baby Names (1880–present), United States, 1884–2025
Yearrecords
18845
18926
18995
19025
19035
19055
19066
19087
19095
191010
19115
19129
191310
191411
191521
191617
191714
191819
191916
192013
192120
192214
192312
192412
192513
192613
192714
192815
192919
193011
193112
193213
19338
193512
19366
19377
19387
19395
19415
19425
19437
19475
19505
19567
19625
19656
19665
19685
19715
19739
19747
19756
197610
19779
19788
19797
198020
198118
198220
198317
198415
198521
198618
198720
198822
198921
199032
199131
199239
199338
199448
199556
199662
199768
199881
199988
200079
2001120
200296
2003127
2004126
2005142
2006148
2007138
2008123
2009111
2010102
201192
201273
201375
201462
201542
201639
201739
201826
201927
202028
202133
202230
202319
202426
202522

US SSA — National Baby Names (1880–present) — 102 years between 1884–2025. One register's own figures, never a sum across registers: two registers counting the same people would double them.

Notable people with this name●

18501900195020002050Isac Ludo, b. 1894Isac Peltz, b. 1899Isac Leo Seeligmann, b. 1907Isac Felix da Silva, b. 1985Isac Santos, b. 1990Isaac Amoah, b. 1992Isac Lidberg, b. 1998Isac Brännström, b. 1998Isac Elliot, b. 2000Isac Johnsson, b. 2006

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●

Attested in 61 sources across 32 countries.

Official registers attesting Isac
CountryRegisterYearCountRank
BR BrazilIBGE — names by decade (Kaggle mirror)202265K—
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—64K#472
BR BrazilIBGE — Nomes (census name API)—37K#951
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)202013K—
SE SwedenSkatteverket — Sök hur många som har ett visst namn (living population)—5.5K#582
SE SwedenSCB — Namnstatistik (to 2023)20204.2K—
US United StatesCensus Bureau — First Name Frequency 2020 by sex20203.4K#5,123
NO NorwaySSB — Navnesøk (name-search service, living population)—1.9K#1,125
FR FranceINSEE — Fichier des prénoms (1900–2024)2024625#876
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—595#472
NO NorwaySSB PxWebApi — Persons/Last names by year (StatBank tables 10501/12891)2025553—
IN IndiaInstate — India surnames (clean spellings) from electoral rolls—391#11,075

Reference works 2

  • Wikipedia given-name tokens
  • 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 2026-09-12 data build · 672 rows in the corpus for this spelling.

Frequently asked questions

How common is the name Isac?
We estimate roughly 76 thousand people bear Isac (counting its spellings and scripts) across 10 countries in our records.
In which country does Isac have the most bearers?
We estimate about 65 thousand people bear Isac in Brazil, more than in any other country in our records, where it is most often spelled isac.
How common is Isac compared with other names?
In Brazil, Isac is the 595th most common given name of 536,280 given names recorded there.
Is Isac a male or female name?
Isac 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.
What does the name Isac mean?
Recorded meaning: Initialism of Idol Star Athletics Championships (Korean biannual Athletics gathering).
Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/isac

The same payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. Rate-limited for casual use. Bulk access and licensing.

About this data

● measured from records◐ inferred from the name graph○ machine-generated

Data snapshot . Figures are rebuilt periodically and will change.

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, “Isac” — the 595th most common given name in Brazil. Data snapshot 2026-09-12.

See how Isac parses inside a full name →