Thaddaeus vs Aleksei

Baby Name Comparison — 2026

Thaddaeus

Boy #5,721 Most Popular 3 Syllables

"heart, courageous heart"

Origin: Aramaic

Christian English Greek Latin

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Boy #5,658 Most Popular 3 Syllables

"defender of mankind"

Origin: Greek

Russian Ukrainian Eastern European Greek

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Thaddaeus Rank #5,721

Aleksei Rank #5,658

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

Is Thaddaeus or Aleksei more popular?

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

What do Thaddaeus and Aleksei mean?

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

Are Thaddaeus and Aleksei boy or girl names?

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