Alaster vs Theodore

Baby Name Comparison — 2026

Alaster

Boy #5,903 Most Popular 3 Syllables

Meaning

"defender of men, protector of mankind"

Origin: Greek via Scottish Gaelic

Cultural Roots

Scottish Irish English Celtic

Quick Stats

Popularity Rank
#5,903
Total SSA Count
16
Syllables
3
Formality
Formal
Nicknames
Al, Allie, Aster

Playground Safety Score

✓ All Clear
Full profile for Alaster →

Popularity Comparison

Alaster Rank #5,903
Theodore Rank #4

Theodore is more popular, ranked #4 vs #5903 for Alaster.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Alaster ___

  • Alaster James
  • Alaster William
  • Alaster Hugh
  • Alaster Fraser
  • Alaster Ross
  • Alaster Douglas

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 Alaster

Callum Fergus Duncan Malcolm Fiona

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 Alaster or Theodore more popular?

Theodore is more popular, ranked #4 compared to Alaster at #5903 in the United States.

What do Alaster and Theodore mean?

Alaster means "defender of men, protector of mankind" (Greek via Scottish Gaelic origin). Theodore means "divine gift" (Greek origin).

Are Alaster and Theodore boy or girl names?

Alaster is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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