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Home › Baby Names Directory › Thaddaeus

Thaddaeus

♂ Boy

Pronounced thad-EE-əs /θædˈi.əs/Medium

Meaning: From the Greek Thaddaios — likely from Aramaic, 'heart; courageous, large-hearted'; possibly linked to 'a gift'; routes layeredLow

In 30 seconds: Courageous heart: Thaddaeus is a biblical name — 'courageous, large-hearted'. Lyrical, classic, and warm (said 'thad-EE-əs').
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Origin MediumAramaic, Greek
MeaningFrom the Greek Thaddaios — likely from Aramaic, 'heart; courageous, large-hearted'; possibly linked to 'a gift'; routes layered
U.S. rank (2025)#8185 ↘ Falling
2025 U.S. births10 boys (0.00% of U.S. boys)
Peak year2005
Total births (all-time)≈ 1,035

Popularity in the U.S. · SSA data

peak 200819242025

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Thaddaeus is the Latin/Greek form of Thaddaios — likely from Aramaic, 'heart; courageous, large-hearted' (possibly also linked to a word for 'a gift'; routes layered, which we note). St Thaddaeus (Jude) was one of the twelve apostles. A lyrical, classic biblical name (said 'thad-EE-əs'; nickname Thad).

In the U.S. it appears in devout families. Rare, a-courageous-heart at the root, and classic.

Did you know? Thaddaeus (Thaddaios) likely comes from Aramaic, 'heart; courageous, large-hearted' (possibly also linked to 'a gift') — the apostle Thaddaeus — a lyrical, classic biblical name (the routes are layered, which we note; said 'thad-EE-əs').
Overall data confidence 60%
Behind the Name — Thaddeus — routes layered

Variations

ThaddeusTadeoThaddius

Nicknames

Thad

Famous Bearers

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If you like Thaddaeus…

Thaddeus— the common spelling
Tadeo— the Spanish form
Matthias— a fellow apostle boys' name
Barnabas— another biblical -as boys' name

Explore names like Thaddaeus

By themeuncertaingreekbiblicalgiftaramaic
By meaningGift / BlessingBrave / Courage

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Frequently Asked

What does the name Thaddaeus mean?

Thaddaeus likely comes from Aramaic, 'heart; courageous, large-hearted'; the routes are layered.

How do you pronounce Thaddaeus?

It's said thad-EE-əs /θædˈi.əs/ — three syllables, stress on the second.

Is Thaddaeus a boy or girl name?

Thaddaeus is a boy's name.

How popular is Thaddaeus?

Thaddaeus is a rare name in the U.S.

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