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Isac

#4,599 in 2025Boys' name

Form of Isaac

Isac has been given to 3,203 babies in the U.S. since 1884. In 2025 it ranked #4,599 of 13,926 boys’ names in use. Its peak year was 2006, with 148 recorded.

Babies named Isac, 2025

1 in 151,000

Isac over time, 1880–2025

Boys
05010015018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Isac: meaning, origin, and history

Form of Isaac

Deeper origin not confirmed in the cited records

What Isac means

Isac is a form of Isaac.

Meaning behind the documented name family

The name developed through Isac → Isaac. The family’s proposed meaning is “he laughs, he will laugh”, recorded in English with the source elements Yiṣḥāq.

Origin, language, and formation

Isac is used in Swedish.

Related names and everyday forms

Related names include Isaac.

American usage and historical context

In the United States, 3,203 boys were recorded with the name Isac between 1884 and 2025. Its highest annual count was 148 in 2006; its best national rank was #1,015 in 1892.

Over 5 years its rank fell, from #3,754 in 2020 to #4,599 in 2025. Over 10 years its rank fell, from #2,825 in 2015 to #4,599 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Isac?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 151,000
22 of 3,315,165 births
Among boys only
1 in 77,600
<0.01% of boys
Rank, 2025
#4,599
of 13,926 boys’ names in use
Coin-flip room size
104,451 kids
Even odds of a second one

Where Isac sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 104,451 children born in 2025 and it's an even bet that one of them is another Isac. In a class of 30 the chance is Under 1%.

When Isacs were born

Half of everyone ever recorded as Isac was born before 2003 — so the typical Isac is around 22 today.

Median birth year
2003
About 22 years old
Biggest decade
2000s
37.8% of all use
Born in the last 25 years
58.3%
A modern name
Recorded since 1950
2,774
People you could plausibly meet
Choose a decade

2000s — 37.8% of all recorded uses (1,210).

Is Isac rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
−480
Places dropped
Rank vs 5 years ago
−845
Places dropped
Rank vs 10 years ago
−1,774
Places dropped
Births vs 10 years ago
0.52×
Fewer babies than then
Share of its own peak
14.9%
Peak was 2006 (148)
Years since peak
19
Years
Year-to-year steadiness
Shifting
14.3% average annual change
Best rank ever
#1,015
1892

Spellings of Isac

Isac is not the most common spelling — Isaac is, with 30.7% against Isac's 0.30%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Isac is used

Across 1910–2025, Isac was most concentrated in California — about 1 in 25,000 boys, against 1 in 74,374 across all states with data. It was least common in Pennsylvania (1 in —).

04 per 100,000

Most concentrated

  1. 1California1 in 25,000
  2. 2Texas1 in 33,333
  3. 3Arizona1 in 50,000
  4. 4Colorado1 in 100,000
  5. 5Illinois1 in 100,000
  6. 6Nevada1 in 100,000
  7. 7Washington1 in 100,000
  8. 8Alabama1 in —

Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Isac has too little recent state data to map, so this covers all years from 1910.

Isac around the world

Where Isac ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    2004–2025
    #3,256
    in 2025
  • Scotland
    2025–2025
    #762
    in 2025
  • Ireland
    2001–2024
    #655
    in 2024
  • France
    1931–2025
    #705
    in 2025
  • Norway
    1880–2025
    #301
    in 2025
  • Canada
    2003–2021
    #2,487
    in 2021
  • South Australia
    2005–2012
    #771
    in 2012

Popularity data from Office for National Statistics, National Records of Scotland, Central Statistics Office, Institut national de la statistique et des études économiques, Statistics Norway, Statistics Canada and Consumer and Business Services (South Australia). ONS, NRS data under Open Government Licence v3.0. CSO, SSB, CBS SA data under CC BY 4.0. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence.

Notable people named Isac

People whose public names include Isac, backed by Wikidata given-name records and ordered by linked Wikimedia pages. The name may be a middle name.

People data from Wikidata (CC0). Fame is measured, not judged — the order reflects how widely each person is documented, not the U.S. birth records popularity this page is otherwise about.

Isac in other languages

Cross-language forms and variants of Isac. Linked forms have their own page here.

IsakIzakIsaacIsaakIssacIzaacIzaakYitzhakIzsákIsaccoIisakki

Variant forms from Wikidata (CC0). Most are used mainly outside the United States; U.S. birth records statistics cover US usage only.

Isac by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#4,599
Trend vs 5 yrs ago
Down 845
Best rank ever
#1,015
1892
Peak year
2006
148 that year
First recorded
1884
Last recorded
2025
All-time count
3,203
Count in 2025
22

Names similar to Isac

Matched on shared beginnings and endings, similar length, and comparable popularity.

IsaelIsaIsaiIsaakIsakIsaccIsaihIsamIsaiaIsadoreIsayahIsaihaIsaiasIsabelIsaisIsahiIsauroIsamuIsanIsaoIssacIsaahIsairIsaack

Names with a curve like Isac

Not spelling — timing. These names rose, peaked and faded in the same years as Isac, so they read as being from the same moment even when they look nothing alike.

TrentenHadenDaveonJavinQuinlanJovanyRyleyVarunTravionDonavinMiguelangelJordin

Sibling names for Isac

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Isac

Top names of 2006, Isac's peak yearThe 2000s in fullOther names that peaked in 1892Boys' names starting with ISwedish NamesUncommon Swedish Boy Names