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Home › Baby Names Directory › Thadeus

Thadeus

♂ Boy

Pronounced THAD-ee-us /ˈθæd.i.əs/Medium

Meaning: Thadeus is a modern spelling of Thaddeus, a name of Aramaic origin borne by one of the twelve apostles; its meaning is often given as 'heart' or 'courageous.' The reduced spelling route is uncertain, which we note.Low

In 30 seconds: A biblical name in fresh dress: Thadeus is a spelling of Thaddeus, the apostle's name (said 'THAD-ee-us'). Its route is uncertain, which we note.
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Origin LowAramaic, Greek
MeaningThadeus is a modern spelling of Thaddeus, a name of Aramaic origin borne by one of the twelve apostles; its meaning is often given as 'heart' or 'courageous.' The reduced spelling route is uncertain, which we note.
U.S. rank (2025)#11845 ↗ Rising
2025 U.S. births6 boys (0.00% of U.S. boys)
Peak year1918
Total births (all-time)≈ 1,123

Popularity in the U.S. · SSA data

peak 197219122025

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

Thadeus trims the double-d of Thaddeus, a name of Aramaic origin carried by the apostle Jude Thaddeus. It keeps the classic sound with a simpler look; its route is uncertain, which we note (said 'THAD-ee-us').

In the U.S. it appears only rarely as a boys' name, against the fuller Thaddeus. Rare, classic-rooted, and warm.

Did you know? Thadeus is a streamlined spelling of Thaddeus, the Aramaic name of one of the twelve apostles — often read as 'heart' or 'courageous.' The spelling route is uncertain, which we note (said 'THAD-ee-us').
Overall data confidence 46%
References — Thadeus — Variant of Thaddeus; Aramaic; the apostle; route uncertain

Variations

ThaddeusThadeous

Nicknames

ThadTad

Famous Bearers

  • Famous bearers coming soon.

If you like Thadeus…

Thaddeus— the fuller spelling Thadeus trims
Cornelius— a like classical -us name
Silas— a like biblical, s-close pick
Amos— a like old, compact scriptural name

Explore names like Thadeus

By themeuncertainclassicbiblicalrespelling
By meaningGift / BlessingBrave / Courage

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Frequently Asked

What does the name Thadeus mean?

Thadeus is a variant of Thaddeus, an Aramaic name borne by an apostle, often read as 'heart' or 'courageous'; the route is uncertain, which we note.

How do you pronounce Thadeus?

It's said THAD-ee-us /ˈθæd.i.əs/ — three syllables, stress on the first.

Is Thadeus a boy or girl name?

Here Thadeus is used as a boy's name, as Thaddeus traditionally is.

How popular is Thadeus?

Thadeus is a rare spelling for boys in the U.S., against the fuller Thaddeus.

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