Isac
Masculine · “he will laugh”
Isac is the Scandinavian and Romanian spelling of Isaac, and the Hebrew name is a verb in the future — he will laugh.
How old is the name Isac?
Isac first appears in US birth records in 1884 — 141 years ago. The typical Isac alive today was born around 2002, making them about 23 years old. About 2,700 people named Isac are estimated to be alive in the US today.
When was the name Isac most popular?
Isac peaked in 1892, reaching #956 nationally. Today it ranks #4539, 3,583 places below that high. See the whole 1892 chart.
Lists built from the same records:
Where it comes from
Origin, sound and short forms
Our story of Isac
Ours, offered as ours. The laughter in this name is not simple: Abraham laughs and falls on his face, Sarah laughs behind the tent and denies it when challenged, and later she says God has made laughter for her and that everyone who hears will laugh with her. The word turns over three times in a few chapters, from disbelief to shame to joy. A name that carries all three is doing more work than most.
Meaning
he will laugh
From Hebrew yitzchaq, he laughs; Genesis has both parents laugh when told of the birth and names the child for it. The name is a verb rather than a noun, which is unusual and deliberate.
Pronouncing Isac
EE-sak
Two syllables, first stressed in Scandinavian. Americans say EYE-zak.
Nicknames for Isac
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1884
- Most boys named
- 2006148 — the highest on record
- Peak rank
- #956reached in 1892
- Change vs 2023
- +15.8%22 in 2025, from 19
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Isac in other languages
The same name elsewhere
- Isac in Swedish — same name
- Isaac in English — same name
- Isac in Romanian — same name
Strongest US states over the last decade: California, Texas, Arizona.
Isacs among us
people named Isac are estimated to be alive in the US today
About 1 boy in 77,640 born in 2025 was named Isac
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Isac
- #4539
- Isac on the 2025 chart
- #47
- counting every spelling
The SSA counts spellings, not names. Isac went to 22 boys in 2025, but Isaac, Isaak and Izaac and the rest below are the same name said out loud. Together the 11 spellings went to 6,198, which makes it the 47th most-given boys’ name of the year — 4,492 places above the chart.
and 5 rarer spellings.
About 1 boy in 276 born in 2025 was given one of these spellings — against 1 in 77,640 for Isac itself.
Spellings are grouped by a fixed rule that folds interchangeable English spellings of one sound (ck/k, ph/f, x/ks, a non-initial y for i) and keeps vowels apart, so Sean and Shawn stay separate names. It errs towards splitting: a family here is never larger than the truth. SSA national data, 2025. Method
Is it right for you
What happens to a name after it peaks
Fashion outlook
Isac sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Isac beside its neighbors
The names ranked closest to Isac in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- A settled meaning that the biblical text explains three times over.
- Ike and Izzy are both ready short forms.
- Four letters and two syllables, about as easy to write as a name gets.
- Isaac is the standard English spelling and will be written for him.
- The Scandinavian and American pronunciations differ at the first vowel.
- Isac, Isak, Izak and Isaac are all in use and only Isaac is common.
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Isac
Masculine · #4539 in the U.S.
Frequently asked
- How many Isacs are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 2,700 people named Isac are estimated to be alive in the US today.
- How do you spell Isac?
- Isac is one of 6 recorded spellings. Isaac is the more common one — 5,953 births in 2025 against 22 for Isac.
- How popular is the name Isac in 2025?
- Isac ranks #4539 among US boy names in 2025, with 22 babies given the name.
- How rare is the name Isac?
- About 1 in every 77,640 US boys born in 2025 was named Isac — 22 in all.
- Will my child share the name Isac with classmates?
- Isac will almost certainly be the only one in school.
Ranked beside Isac
Names sitting at a similar level of popularity right now.
Nels#4539 · Gabe#4539 · Michel#4539 · Elroy#4539 · Orlin#4539 · Pearce#4539 · Josemaria#4539 · Napoleon#4539
Looking for what else is popular rather than what resembles Isac? See the current top 100.
Choosing between Isac and another name?
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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