Leonard vs Thaddeus

Baby Name Comparison — 2026

Thaddeus

Boy #850 Most Popular 3 Syllables

Meaning

"courageous heart"

Origin: Aramaic

Cultural Roots

English Polish American Catholic

Quick Stats

Popularity Rank
#850
Total SSA Count
284
Syllables
3
Formality
Formal
Nicknames
Thad, Tad, Taddy

Playground Safety Score

✓ All Clear
Full profile for Thaddeus →

Popularity Comparison

Leonard Rank #674
Thaddeus Rank #850

Leonard is more popular, ranked #674 vs #850 for Thaddeus.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Leonard ___

  • Leonard James
  • Leonard Charles
  • Leonard Michael
  • Leonard William
  • Leonard Patrick
  • Leonard Allen

Thaddeus ___

  • Thaddeus James
  • Thaddeus William
  • Thaddeus John
  • Thaddeus August
  • Thaddeus Cole
  • Thaddeus Lee

Sibling Name Ideas

Names that pair well as siblings.

If you choose Leonard

Walter Arthur Dorothy Harriet Eugene

If you choose Thaddeus

Augustus Sebastian Cornelius Edmund Beatrice

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 Leonard or Thaddeus more popular?

Leonard is more popular, ranked #674 compared to Thaddeus at #850 in the United States.

What do Leonard and Thaddeus mean?

Leonard means "brave lion, lion-strong" (Germanic origin). Thaddeus means "courageous heart" (Aramaic origin).

Are Leonard and Thaddeus boy or girl names?

Leonard is primarily a boy name. Thaddeus is primarily a boy name.

More Comparisons

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← Full profile: Leonard ← Full profile: Thaddeus Browse all baby names