Isaac vs William

Baby Name Comparison — 2026

Isaac

Boy #40 Most Popular 3 Syllables

"He will laugh; laughter"

Origin: Hebrew

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✓ All Clear

Boy #10 Most Popular 3 Syllables

"resolute protector, strong-willed guardian"

Origin: Germanic

English German French

✓ All Clear

Isaac Rank #40

William Rank #10

William is more popular, ranked #10 vs #40 for Isaac.

Is Isaac or William more popular?

William is more popular, ranked #10 compared to Isaac at #40 in the United States.

What do Isaac and William mean?

Isaac means "He will laugh; laughter" (Hebrew origin). William means "resolute protector, strong-willed guardian" (Germanic origin).

Are Isaac and William boy or girl names?

Isaac is primarily a boy name. William is primarily a boy name.