Isac
given name · Latin script
Meaning: Initialism of Idol Star Athletics Championships (Korean biannual Athletics gathering)
Recorded as a male name· opposite-gender records fall within measured source noise
/izɐk/(machine-generated) pronunciation, model-generated
Isac is a given name written in the Latin script, with more bearers in Brazil than in any other country. In Mozambique it is the 19th most common given name.
- BRBrazil1 in 3.3K(measured from records)
- PEPeru≈1 in 23K
- USUnited States1 in 97K
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)
- Sources
- 187 (measured from records)
- ≈1 in 1.6K (inferred from the name graph)
64,850 people, 2022
Highest-authority source
Mozambique, est.
measured from records inferred from the name graph
Meaning & origin(measured from records)
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(measured from records)
Isac 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 | — | 64,850 | 1 in 3.3K | 65K | Isac | 140 |
| MZ Mozambique | #19 | ≈19,000 est. | ≈1 in 1.6K | — | Isac | 21 |
| SE Sweden | — | 5,477 | 1 in 1.9K | 5.5K | Isac | 46 |
| US United States | — | 3,420 | 1 in 97K | 3.4K | Isac | 187 |
| PE Peru | — | ≈1,400 est. | ≈1 in 23K | — | Isac | 44 |
| NO Norway | — | 553 | 1 in 9.9K | 1.9K | — | 12 |
| FI Finland | — | 332 | 1 in 17K | 369 | — | 13 |
64,850 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: IBGE — names by decade (Kaggle mirror); Census Bureau — First Name Frequency 2020 by sex; Skatteverket — Sök hur många som har ett visst namn (living population); SSB PxWebApi — Persons/Last names by year (StatBank tables 10501/12891); SSB — Navnesøk (name-search service, living population); DVV — Etunimitilasto (Finnish given names register); DVV — Nimipalvelu (Finnish name service, per-name lookup). 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).
Notable people with this name(measured from records)
- Isac Ludob. 1894RORomanian writer
- Isac Peltzb. 1899RORomanian journalist
- Isac Leo Seeligmannb. 1907ILIsraeli biblical scholar (1907-1982)
- Isac Felix da Silvab. 1985BRfootballer
- Isac Santosb. 1990BRBrazilian volleyball player
- Isaac Amoahb. 1992GHnot in their usual nameassociation football player
- Isac Lidbergb. 1998SEassociation football player
- Isac Brännströmb. 1998SESwedish ice hockey player
- Isac Elliotb. 2000FIFinnish pop singer, songwriter, dancer and actor
- Isac Johnssonb. 2006SESwedish association football player
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)
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 61 sources across 32 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2022 | 65K | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 64K | #472 |
| BR Brazil | IBGE — Nomes (census name API) | — | 37K | #951 |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | 2020 | 13K | — |
| SE Sweden | Skatteverket — Sök hur många som har ett visst namn (living population) | — | 5.5K | #582 |
| SE Sweden | SCB — Namnstatistik (to 2023) | 2020 | 4.2K | — |
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 3.4K | #5,123 |
| NO Norway | SSB — Navnesøk (name-search service, living population) | — | 1.9K | #1,125 |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 595 | #472 |
| NO Norway | SSB PxWebApi — Persons/Last names by year (StatBank tables 10501/12891) | 2025 | 553 | — |
| FI Finland | DVV — Nimipalvelu (Finnish name service, per-name lookup) | — | 369 | #1,281 |
| FI Finland | DVV — Etunimitilasto (Finnish given names register) | — | 332 | — |
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 2026-10-09 data build.
Frequently asked questions
- What does the name Isac mean, and where does it come from?
- Initialism of Idol Star Athletics Championships (Korean biannual Athletics gathering). Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- How do you pronounce Isac?
- A machine transcription gives /izɐk/ (IPA) for Portuguese.
- 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 are other forms of the name Isac?
- In the etymology graph, Isaac, Issac and Ike are forms of the same name in other languages.
- In which country does Isac have the most bearers?
- In Brazil, the national register counted about 65 thousand people named Isac, more than in any other country we hold, where it is most often spelled isac.
- How common is the name Isac?
- In Brazil, the national register counted 64,850 people named Isac in 2022, about 1 in 3.3 thousand residents.
- How common is Isac compared with other names?
- In Mozambique, Isac is the 19th most common given name of 1,034 given names recorded there.
What do you want to know about Isac?
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/isacThe 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, “Isac” — the 19th most common given name in Mozambique. Data snapshot 2026-10-10.