Jack vs Theo

Baby Name Comparison — 2026

Jack

Boy #15 Most Popular 1 Syllable

"supplanter"

Origin: Hebrew

English Irish American Australian

✓ All Clear

Boy #80 Most Popular 2 Syllables

"gift of God"

Origin: Greek (theodoros)

English Greek French German American

✓ All Clear

Jack Rank #15

Theo Rank #80

Jack is more popular, ranked #15 vs #80 for Theo.

Is Jack or Theo more popular?

Jack is more popular, ranked #15 compared to Theo at #80 in the United States.

What do Jack and Theo mean?

Jack means "supplanter" (Hebrew origin). Theo means "gift of God" (Greek (theodoros) origin).

Are Jack and Theo boy or girl names?

Jack is primarily a boy name. Theo is primarily a boy name.