Boy name · Aramaic
Thaddeus
“heart, or courageous”
Vibes
Common nicknames
Short-forms and diminutives parents often use for Thaddeus.
Explore Thaddeus further
Similar-feel alternatives, or middle-name candidates that pair well with Thaddeus — both ranked by the same scoring system (vibe overlap, syllable rhythm, origin compatibility).
About the name
Thaddeus is one of the twelve apostles and one of the least certain names in the New Testament. The Greek Thaddaios is generally traced to an Aramaic root — taddā, breast or heart, giving something like courageous — but the manuscripts disagree on whether he is Thaddeus, Lebbaeus, or Judas son of James at all.
The uncertainty is part of the record rather than a gap in it, and this page will not tidy it up.
Three syllables, said THAD-ee-us. Thad is the working short form. On our vibe map it is Dark Academia with Heirloom weight.
More Aramaic names
Thaddeus sits in our Aramaic set — these share its roots.
All Aramaic names →Thaddeus — common questions
Is Thaddeus a boy or girl name?
Thaddeus is traditionally a boy name of Aramaic origin.
What does the name Thaddeus mean?
Thaddeus means “heart, or courageous” of Aramaic origin. Thaddeus is one of the twelve apostles and one of the least certain names in the New Testament. The Greek Thaddaios is generally traced to an Aramaic root — taddā, breast or heart, giving something like courageous — but the manuscripts disagree on whether he is Thaddeus, Lebbaeus, or Judas son of James at all.
Where does the name Thaddeus come from?
Thaddeus is Aramaic in origin. The uncertainty is part of the record rather than a gap in it, and this page will not tidy it up.
What are common nicknames for Thaddeus?
Thad and Tad — the short-forms parents most often use for Thaddeus.
How popular is Thaddeus?
Thaddeus did not make the top 1,000 boys' names in US Social Security Administration data for 2025, which makes it genuinely rare in the US.
Bring the name into the room
A couple of nice things named Thaddeus you might want for the nursery.