Jack vs Theodore

Baby Name Comparison — 2026

Jack

Boy #15 Most Popular 1 Syllable

Meaning

"supplanter"

Origin: Hebrew

Cultural Roots

English Irish American Australian

Quick Stats

Popularity Rank
#15
Total SSA Count
8,434
Syllables
1
Formality
Casual
Nicknames
Jackie

Playground Safety Score

✓ All Clear
Full profile for Jack →

Popularity Comparison

Jack Rank #15
Theodore Rank #4

Theodore is more popular, ranked #4 vs #15 for Jack.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Jack ___

  • Jack Henry
  • Jack Thomas
  • Jack William
  • Jack Oliver
  • Jack James
  • Jack Edward

Theodore ___

  • Theodore James
  • Theodore William
  • Theodore Alexander
  • Theodore John
  • Theodore Henry
  • Theodore Arthur

Sibling Name Ideas

Names that pair well as siblings.

If you choose Jack

Charlie Lily Oliver Sophie Harry

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Jack or Theodore more popular?

Theodore is more popular, ranked #4 compared to Jack at #15 in the United States.

What do Jack and Theodore mean?

Jack means "supplanter" (Hebrew origin). Theodore means "divine gift" (Greek origin).

Are Jack and Theodore boy or girl names?

Jack is primarily a boy name. Theodore is primarily a boy name.

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← Full profile: Jack ← Full profile: Theodore Browse all baby names