Sinclair vs Theodore

Baby Name Comparison — 2026

Sinclair

Girl #4,857 Most Popular 2 Syllables

Meaning

"from Saint Clair, bright and clear"

Origin: Norman French via Scottish

Cultural Roots

Scottish English American

Quick Stats

Popularity Rank
#4,857
Total SSA Count
28
Syllables
2
Formality
Formal
Nicknames
Sin, Claire, Clair

Playground Safety Score

✓ All Clear
Full profile for Sinclair →

Popularity Comparison

Sinclair Rank #4,857
Theodore Rank #4

Theodore is more popular, ranked #4 vs #4857 for Sinclair.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Sinclair ___

  • Sinclair Rose
  • Sinclair Grace
  • Sinclair Jane
  • Sinclair Elise
  • Sinclair Mae
  • Sinclair Wren

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 Sinclair

Tennyson Hollis Marlowe Fletcher Waverly

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 Sinclair or Theodore more popular?

Theodore is more popular, ranked #4 compared to Sinclair at #4857 in the United States.

What do Sinclair and Theodore mean?

Sinclair means "from Saint Clair, bright and clear" (Norman French via Scottish origin). Theodore means "divine gift" (Greek origin).

Are Sinclair and Theodore boy or girl names?

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

More Comparisons

Theodore vs Sinclair Sinclair vs Aleana Sinclair vs Kamri Sinclair vs Zamaria Sinclair vs Nymeria
← Full profile: Sinclair ← Full profile: Theodore Browse all baby names