Aleksei vs Theodore

Baby Name Comparison — 2026

Aleksei

Boy #5,658 Most Popular 3 Syllables

Meaning

"defender of mankind"

Origin: Greek

Cultural Roots

Russian Ukrainian Eastern European Greek

Quick Stats

Popularity Rank
#5,658
Total SSA Count
17
Syllables
3
Formality
Formal
Nicknames
Alek, Aleks, Lyosha

Playground Safety Score

✓ All Clear
Full profile for Aleksei →

Popularity Comparison

Aleksei Rank #5,658
Theodore Rank #4

Theodore is more popular, ranked #4 vs #5658 for Aleksei.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Aleksei ___

  • Aleksei Ivan
  • Aleksei Dmitri
  • Aleksei Mikhail
  • Aleksei Nikolai
  • Aleksei Sergei
  • Aleksei 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 Aleksei

Natasha Katya Dmitri Ivan Sasha

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 Aleksei or Theodore more popular?

Theodore is more popular, ranked #4 compared to Aleksei at #5658 in the United States.

What do Aleksei and Theodore mean?

Aleksei means "defender of mankind" (Greek origin). Theodore means "divine gift" (Greek origin).

Are Aleksei and Theodore boy or girl names?

Aleksei is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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