Jack vs William

Baby Name Comparison — 2026

Jack

Boy #15 Most Popular 1 Syllable

"supplanter"

Origin: Hebrew

English Irish American Australian

✓ All Clear

Boy #10 Most Popular 3 Syllables

"resolute protector, strong-willed guardian"

Origin: Germanic

English German French

✓ All Clear

Jack Rank #15

William Rank #10

William is more popular, ranked #10 vs #15 for Jack.

Is Jack or William more popular?

William is more popular, ranked #10 compared to Jack at #15 in the United States.

What do Jack and William mean?

Jack means "supplanter" (Hebrew origin). William means "resolute protector, strong-willed guardian" (Germanic origin).

Are Jack and William boy or girl names?

Jack is primarily a boy name. William is primarily a boy name.