Sydney vs Theodore

Baby Name Comparison — 2026

Sydney

Girl #288 Most Popular 2 Syllables

Meaning

"wide island; broad river-island"

Origin: Old English

Cultural Roots

American English Australian

Quick Stats

Popularity Rank
#288
Total SSA Count
1,097
Syllables
2
Formality
Moderate
Nicknames
Syd, Sid

Playground Safety Score

✓ All Clear
Full profile for Sydney →

Popularity Comparison

Sydney Rank #288
Theodore Rank #4

Theodore is more popular, ranked #4 vs #288 for Sydney.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Sydney ___

  • Sydney Rae
  • Sydney Grace
  • Sydney Marie
  • Sydney Ann
  • Sydney Paige
  • Sydney Kate

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 Sydney

Savannah Brooklyn Quinn Riley Parker

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 Sydney or Theodore more popular?

Theodore is more popular, ranked #4 compared to Sydney at #288 in the United States.

What do Sydney and Theodore mean?

Sydney means "wide island; broad river-island" (Old English origin). Theodore means "divine gift" (Greek origin).

Are Sydney and Theodore boy or girl names?

Sydney is primarily a girl name. Theodore is primarily a boy name.

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