Jack vs Leo

Baby Name Comparison — 2026

Jack

Boy #15 Most Popular 1 Syllable

"supplanter"

Origin: Hebrew

English Irish American Australian

✓ All Clear

Boy #24 Most Popular 2 Syllables

"lion-hearted, brave"

Origin: Latin

English Italian German French American Spanish

✓ All Clear

Jack Rank #15

Leo Rank #24

Jack is more popular, ranked #15 vs #24 for Leo.

Is Jack or Leo more popular?

Jack is more popular, ranked #15 compared to Leo at #24 in the United States.

What do Jack and Leo mean?

Jack means "supplanter" (Hebrew origin). Leo means "lion-hearted, brave" (Latin origin).

Are Jack and Leo boy or girl names?

Jack is primarily a boy name. Leo is primarily a boy name.