Sidney vs Theodore

Baby Name Comparison — 2026

Sidney

Boy #1,374 Most Popular 2 Syllables

Meaning

"from Saint Denis"

Origin: Anglo-Norman French

Cultural Roots

English American Australian

Quick Stats

Popularity Rank
#1,374
Total SSA Count
137
Syllables
2
Formality
Moderate
Nicknames
Sid

Playground Safety Score

✓ All Clear
Full profile for Sidney →

Popularity Comparison

Sidney Rank #1,374
Theodore Rank #4

Theodore is more popular, ranked #4 vs #1374 for Sidney.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Sidney ___

  • Sidney James
  • Sidney Charles
  • Sidney Arthur
  • Sidney George
  • Sidney Philip
  • Sidney Thomas

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 Sidney

Shelby Beverly Evelyn Reginald Stanley

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 Sidney or Theodore more popular?

Theodore is more popular, ranked #4 compared to Sidney at #1374 in the United States.

What do Sidney and Theodore mean?

Sidney means "from Saint Denis" (Anglo-Norman French origin). Theodore means "divine gift" (Greek origin).

Are Sidney and Theodore boy or girl names?

Sidney is primarily a boy name. Theodore is primarily a boy name.

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