Issac

♂ Boy

Pronounced EYE-zuk /ˈaɪ.zək/High

Meaning: Alternate spelling of Isaac, from Hebrew Yitzchak meaning he will laugh or he laughs; referring to the laughter of Abraham and Sarah upon hearing God's promise of a sonHigh

In 30 seconds: Issac is an alternate spelling of Isaac, the Hebrew biblical name meaning he will laugh, given to Abraham and Sarah's miracle son in Genesis — one of the great patriarch names of the Old Testament.

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Origin HighHebrew

MeaningAlternate spelling of Isaac, from Hebrew Yitzchak meaning he will laugh or he laughs; referring to the laughter of Abraham and Sarah upon hearing God's promise of a son

U.S. rank (2025)#915 ↘ Falling

2025 U.S. births258 boys (0.01% of U.S. boys)

Peak year2008

Total births (all-time)≈ 24,545

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

History & Origin

Issac is an alternate spelling of Isaac, from Hebrew Yitzchak (he will laugh). The double-s spelling is a common variant that appears in records and birth certificates when the more standard single-c spelling is transposed. Isaac is the son born to Abraham and Sarah in their extreme old age in Genesis 17–18, named for the laughter that accompanied God's impossible promise. He is the second patriarch of Israel, father of Jacob and Esau.

Isaac in its standard spelling is consistently one of the top 30 boys names in the United States and ranks similarly in the United Kingdom. The Issac variant with double-s appears in birth records as a respelling or phonetic variant and is not uncommon. Historically notable bearers include Sir Isaac Newton, mathematician and physicist, and Isaac Asimov, the science fiction writer. The name carries a combination of ancient patriarchal gravity and scientific prestige.

Did you know? Isaac Newton (spelled Isaac, not Issac) was born on Christmas Day 1642 by the Julian calendar — another connection between the name Isaac and the divine timing of birth, given that the name itself arose from a story of miraculous, late-life birth.

Overall data confidence 93%

Behind the Name — Isaac — Hebrew etymology and biblical context

Variations

IsaacIsaakYitzchak

Nicknames

IkeZacIz

Famous Bearers

★Isaac Newton (1643–1727)
English mathematician and physicist who formulated the laws of motion and universal gravitation and is widely regarded as one of the most influential scientists in history.

If you like Issac…

Isaac— the standard spelling of the same biblical name with identical pronunciation and meaning

Elijah— Hebrew Old Testament patriarch/prophet name in the same top-tier revival category

Ezra— short Hebrew biblical name experiencing the same 21st-century naming revival

Nathaniel— long, weighty Hebrew Old Testament boys name with comparable heritage and nickname options

Frequently Asked

What does the name Issac mean?

Issac is a variant spelling of Isaac, from Hebrew Yitzchak meaning he will laugh — named for the laughter of Abraham and Sarah at God's promise.

How do you pronounce Issac?

It is said EYE-zuk — two syllables, stress on the first.

Is Issac the same as Isaac?

Yes, Issac and Isaac are the same name with different spellings; Isaac is the standard form while Issac transposes the letters.

Who was Isaac in the Bible?

Isaac was the miracle son of Abraham and Sarah, the second patriarch of Israel, and the father of Jacob and Esau.