Aleksei vs Thaddaeus

Baby Name Comparison — 2026

Aleksei

Boy #5,658 Most Popular 3 Syllables

"defender of mankind"

Origin: Greek

Russian Ukrainian Eastern European Greek

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Boy #5,721 Most Popular 3 Syllables

"heart, courageous heart"

Origin: Aramaic

Christian English Greek Latin

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Aleksei Rank #5,658

Thaddaeus Rank #5,721

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

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.