Isaacs

surname · English · Latin script

Recorded for both men and women· direction only, no split published

Isaacs is a surname, with more bearers in the United States than in any other country. In Lesotho it is the 2nd most common surname. It appears chiefly in English and Spanish, written in the Latin script. Recorded meaning: Mainly Jewish, but also English and Welsh; patronymic from Isaac.

rarermore common
  • GYGuyana1 in 658◐
  • ZASouth Africa1 in 2.6K
  • AUAustralia1 in 17K

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

≈17K ●

across 12 countries

Sources
352 ●

156K records

Official registry-verified

1 in 441 ◐

St. Vincent & Grenadines

Meaning & origin●

Mainly Jewish, but also English and Welsh; patronymic from Isaac.

Sources 1

  • Dictionary of American Family Names

Attested in 1 language in the etymology graph.

Where in the world●

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

Where Isaacs is recorded, by country
CountryMost common spellingSources
US United States—14,951119K rec.1 in 22K15KIsaacs352
ZA South Africa#20211,44311K rec.——Isaacs93
GB United Kingdom—10,5338.6K rec.——Isaacs143
AU Australia—4,8564.4K rec.——Isaacs117
CA Canada—3,0873K rec.——Isaacs96
GY Guyana#501,140698 rec.1 in 6581.1KIsaacs8
IT Italy—819834 rec.——Isaacs12
NZ New Zealand—507426 rec.——Isaacs39
JM Jamaica#286505510 rec.——Isaacs15
LS Lesotho#2373895 rec.——Isaacs2
VC St. Vincent & Grenadines—230△8 rec.1 in 441230—6
EG Egypt—194189 rec.——Isaacs8

Roughly 15K people in United States bear this name (about 1 in 22K). 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●

  • English157K80%
  • Spanish6.7K3%
  • 5.5K3%
  • Welsh3.1K2%
  • German2.4K1%
Show as table
Languages in which the name is recorded
NameRecordsNote
English156,93980%
Spanish6,6883%
5,4653%
Welsh3,1022%
German2,4271%

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◐

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

  • Spanish surname10K records spelled Isaacs4 spellings in the group

    Most recorded in United States, Colombia, Mexico, Venezuela

    Languages: Spanish, Portuguese

    Also written Isaac'S

  • German surname2.6K records spelled Isaacs2 spellings in the group

    Most recorded in United States, Germany, South Africa, United Kingdom

    Also written Isaàcs

  • Swahili surname2.5K records spelled Isaacs6 spellings in the group

    Most recorded in South Africa, United States, United Kingdom, Canada

    Languages: Swahili, Southern Sotho

    Also written Isaac'S

  • French surname1.6K records spelled Isaacs3 spellings in the group

    Most recorded in United States, France, South Africa, Spain

    Languages: French, Catalan

    Also written Ïšąäčš

49 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●

Isaacs is also recorded in 5 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.

  • In English, ‘Son of Isaac’.

    as a nameEncyclopedia of surnames [the complete companion to tracing your names history]

  • In English, Katherlne M., US onomastician;

    as a namePronouncing Dictionary of Proper Names

  • In English, Isaac Alfred, Australian jurist;

    as a namePronouncing Dictionary of Proper Names

  • In English, Rufus, British politician

    as a namePronouncing Dictionary of Proper Names

  • In English, Jorge, Colombian author

    as a namePronouncing Dictionary of Proper Names

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●

18001850190019502000Jorge Isaacs, b. 1837Isaac Isaacs, b. 1855Rufus Isaacs, 1st Marquess of Reading, b. 1860Susan Sutherland Isaacs, b. 1885Rufus Isaacs, b. 1914Jeremy Isaacs, b. 1932Cheryl Boone Isaacs, b. 1949Gregory Isaacs, b. 1951Jason Isaacs, b. 1963

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 36 sources across 25 countries.

Official registers attesting Isaacs
CountryRegisterYearCountRank
US United StatesCensus Bureau — Surname Frequency 2010201015K#2,422
US United StatesCensus Bureau — Surname Frequency 2020202014K#2,445
US United StatesCensus Bureau — Surname Frequency 2000200014K#2,306
GY GuyanaGuyana — Official List of Electors July 202520251.1K#69
VC St. Vincent & GrenadinesElectoral Office of St Vincent & the Grenadines — Final Voters List (Nov 2025)2025230#86
ES SpainINE — Apellidos más frecuentes (Padrón Municipal)—86#30,743
ES SpainINE — Padrón per-token widgets (current living counts, given + apellidos)—86#30,530
SE SwedenSkatteverket — Sök hur många som har ett visst namn (living population)—45#13,755
CR Costa RicaTSE — electoral roll (padrón) names—36#2,614
FI FinlandDVV — Nimipalvelu (Finnish name service, per-name lookup)—30#40,752
IN IndiaInstate — India surnames by state (real counts) from electoral rolls—25#7,801
IN IndiaInstate — India surnames (clean spellings) from electoral rolls—23#73,528

Reference works 5

  • Dictionary of American Family Names
  • The Oxford Dictionary of Family Names in Britain and Ireland
  • Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
  • Wikipedia surname 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 · 51 rows in the corpus for this spelling.

Frequently asked questions

How common is the name Isaacs?
We estimate roughly 17 thousand people bear Isaacs (counting its spellings and scripts) across 12 countries in our records.
In which country does Isaacs have the most bearers?
We estimate about 15 thousand people bear Isaacs in the United States, more than in any other country in our records, where it is most often spelled isaacs.
Where is Isaacs most common?
Measured as a share of residents rather than as a count, Isaacs is densest in St. Vincent & Grenadines — about 1 in 441 people — even though United States holds more of our records for it.
How common is Isaacs compared with other names?
In Lesotho, Isaacs is the 2nd most common surname of 3,869 surnames recorded there.
What does the name Isaacs mean?
Recorded meaning: Mainly Jewish, but also English and Welsh; patronymic from Isaac.
Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/isaacs

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, “Isaacs” — the 2nd most common surname in Lesotho. Data snapshot 2026-09-12.

See how Isaacs parses inside a full name →