Aleksei vs Thaddaeus

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
Thaddaeus Rank #5,721

Aleksei is more popular, ranked #5658 vs #5721 for Thaddaeus.

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

Thaddaeus ___

  • Thaddaeus James
  • Thaddaeus William
  • Thaddaeus John
  • Thaddaeus Michael
  • Thaddaeus Joseph
  • Thaddaeus Henry

Sibling Name Ideas

Names that pair well as siblings.

If you choose Aleksei

Natasha Katya Dmitri Ivan Sasha

If you choose Thaddaeus

Barnabas Cornelius Sebastian Bartholomew Philippa

Which Name Fits Your Family?

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Frequently Asked Questions

Is Aleksei or Thaddaeus more popular?

Aleksei is more popular, ranked #5658 compared to Thaddaeus at #5721 in the United States.

What do Aleksei and Thaddaeus mean?

Aleksei means "defender of mankind" (Greek origin). Thaddaeus means "heart, courageous heart" (Aramaic origin).

Are Aleksei and Thaddaeus boy or girl names?

Aleksei is primarily a boy name. Thaddaeus is primarily a boy name.

More Comparisons

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