Isac
Isac was the 4600th most popular name for boys in 2025, given to 22 babies. Its best year was 1892, when it ranked 1016th; the most babies were born in 2006 (148). Over the last ten years it has moved down 1,774 places. More babies were named Isac in the 2000s than in any other decade.
Meaning (as Isaac) 'he laughs / will laugh' · Hebrew
- Rank in 2025
- #4,600 boys, down 843 places since 2020
- Babies in 2025
- 22boys
- Girls and boys
- Almost always a boy’s name2021–2025
- Peak year
- 2006148 babies
- Total since 1880
- 3,203babies recorded
What does the name Isac mean?
Isac is a spelling of Isaac, pronounced the same way, so it shares Isaac's meaning and origin.
Isaac is the Hebrew Yitzhak, 'he laughs' or 'he will laugh'. In Genesis he is the son of Abraham and Sarah, and his name recalls Sarah's laughter at being promised a son in old age. In Genesis 21:6 Sarah says that God has brought her laughter. Medieval Christian and Jewish communities both used the name; DMNES finds it in England from 1222.
יִצְחָק (Biblical Hebrew, “Yitzhak, '(he) will laugh'”)
How sure is this? Well established.
See also: Hebrew names, names that mean joy.
Sources for this meaning
- Dictionary of Medieval Names from European Sources (ed. S. L. Uckelman), Edition 2023 no. 1, s.v. 'Isaac'
- Hebrew Bible, Genesis 21.6, JPS Tanakh: Gender-Sensitive Edition, with translator's note (via Sefaria)
- US Social Security Administration, national baby-name data 1880-2025 (names.zip, yob*.txt), team3 computation
- Wikidata item Q5920537
- Wiktionary, entry 'Isaac'
Isac popularity since 1880
| Year | Rank (boys) | Babies (boys) |
|---|---|---|
| 2025 | #4,600 | 22 |
| 2020 | #3,757 | 28 |
| 2010 | #1,560 | 102 |
| 2000 | #1,525 | 79 |
| 1990 | #2,233 | 32 |
| 1980 | #2,478 | 20 |
| 1970 | — | — |
| 1960 | — | — |
| 1950 | #3,922 | 5 |
| 1940 | — | — |
| 1930 | #2,520 | 11 |
| 1920 | #2,391 | 13 |
| 1910 | #1,079 | 10 |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Isac, counting every spelling?
Isac is a spelling of Isaac, a name family that ranked #44 for boys in 2025 once every spelling is counted together, compared with #4,600 for Isac on its own. Together these spellings went to 6,461 boys in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Isaac | 5,953 | #47 | 32,842 |
| Issac | 258 | #915 | 1,677 |
| Isaak | 48 | #2,693 | 293 |
| Izaak | 41 | #3,016 | 269 |
| Izaac | 44 | #2,856 | 256 |
| Izak | 23 | #4,449 | 144 |
| Isac | 22 | #4,600 | 130 |
| Isak | 38 | #3,154 | 130 |
| Isacc | 10 | #7,880 | 83 |
| Izac | 7 | #10,089 | 54 |
| Izack | 7 | #10,090 | 29 |
Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.
How many kids will share the name Isac?
22 of the 3,606,400 babies born in the US in 2025 were named Isac (0.01 per 1,000 births). For a boy named Isac born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 381 (of 430 pupils) would have a child named Isac.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Isac?
About 2,700 people born in the US named Isac are alive today, with a median age of 21; half are between 16 and 28. That makes Isac mostly worn by children and young adults.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Isac by state
How common Isac was among boys born in each state in 2021–2025. It is notably more common than nationally in California (1.7×), Texas (1.5×). In 49 states fewer than five boys a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Isac: their share of US boys followed the most similar curve since 1880. If you like Isac, they share its era and feel.
Questions about the name Isac
What does Isac mean?
Isac is a spelling of Isaac, which means “'he laughs / will laugh'” (Hebrew origin). Certainty: well established.
How popular is the name Isac?
Isac was the 4600th most popular name for boys in 2025, given to 22 babies. Its best year was 1892, when it ranked 1016th; the most babies were born in 2006 (148). Over the last ten years it has moved down 1,774 places. More babies were named Isac in the 2000s than in any other decade.
Is Isac a boy or girl name?
In 2021–2025, almost always a boy’s name given the name Isac in the US.
Where is Isac most popular?
In 2021–2025, Isac was most common in California (0.03 per 1,000 boys), followed by Texas and Texas.