Alastair vs Theodore

Baby Name Comparison — 2026

Alastair

Boy #2,390 Most Popular 3 Syllables

Meaning

"defender of men"

Origin: Greek via Scottish Gaelic

Cultural Roots

Scottish Irish British American

Quick Stats

Popularity Rank
#2,390
Total SSA Count
59
Syllables
3
Formality
Formal
Nicknames
Al, Ali, Allie

Playground Safety Score

✓ All Clear
Full profile for Alastair →

Popularity Comparison

Alastair Rank #2,390
Theodore Rank #4

Theodore is more popular, ranked #4 vs #2390 for Alastair.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Alastair ___

  • Alastair James
  • Alastair Hugh
  • Alastair Gordon
  • Alastair Fraser
  • Alastair David
  • Alastair Colin

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 Alastair

Catriona Fiona Hamish Angus Isla

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 Alastair or Theodore more popular?

Theodore is more popular, ranked #4 compared to Alastair at #2390 in the United States.

What do Alastair and Theodore mean?

Alastair means "defender of men" (Greek via Scottish Gaelic origin). Theodore means "divine gift" (Greek origin).

Are Alastair and Theodore boy or girl names?

Alastair is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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