Alexei vs Theodore

Baby Name Comparison — 2026

Alexei

Boy #2,778 Most Popular 3 Syllables

Meaning

"defender, helper of mankind"

Origin: Greek 'alexein'

Cultural Roots

Russian Ukrainian Bulgarian Slavic Orthodox Christian

Quick Stats

Popularity Rank
#2,778
Total SSA Count
47
Syllables
3
Formality
Formal
Nicknames
Alyosha, Alex, Lyosha

Playground Safety Score

✓ All Clear
Full profile for Alexei →

Popularity Comparison

Alexei Rank #2,778
Theodore Rank #4

Theodore is more popular, ranked #4 vs #2778 for Alexei.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Alexei ___

  • Alexei Nikolai
  • Alexei Dmitri
  • Alexei Ivan
  • Alexei Sergei
  • Alexei Mikhail
  • Alexei Vladimir

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 Alexei

Natasha Dmitri Sonya Mikhail Katerina

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 Alexei or Theodore more popular?

Theodore is more popular, ranked #4 compared to Alexei at #2778 in the United States.

What do Alexei and Theodore mean?

Alexei means "defender, helper of mankind" (Greek 'alexein' origin). Theodore means "divine gift" (Greek origin).

Are Alexei and Theodore boy or girl names?

Alexei is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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