Thaddeus
/TH-AE-D-IY-AH-S/
Possibly courageous heart or warm-hearted, from an Aramaic original whose exact form and meaning are uncertain — the name appears in the gospels as an apostle also called Lebbaeus or Judas son of James, and ancient sources proposed Aramaic roots meaning breast or heart (suggesting warmth or courage). Some scholars prefer a Greek or Persian origin. The honest answer is that the etymology is genuinely disputed; the name's warmth rests on its apostolic use.
See Thaddeus scored for your familyQuick — what every parent wants to know about Thaddeus:
Yes — Thaddeus is a Christian boy name of Greek origin, meaning “Possibly courageous heart or warm-hearted, from an Aramaic original whose exact form and meaning are uncertain — the name appears in the gospels as an apostle also called Lebbaeus or Judas son of James, and ancient sources proposed Aramaic roots meaning breast or heart (suggesting warmth or courage). Some scholars prefer a Greek or Persian origin. The honest answer is that the etymology is genuinely disputed; the name's warmth rests on its apostolic use.”.
How well does Thaddeus fit your family?
This page tells you what Thaddeus means. The app tells you whether it's right for your baby — scored against the names already in your family, your heritage, and your baby's exact birth star.
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Six signals — scored for your family, not in the abstract:
Meaning & origin
Thaddeus is a boy's name of Greek origin, traditionally used in Christian families. The name means "Possibly courageous heart or warm-hearted, from an Aramaic original whose exact form and meaning are uncertain — the name appears in the gospels as an apostle also called Lebbaeus or Judas son of James, and ancient sources proposed Aramaic roots meaning breast or heart (suggesting warmth or courage). Some scholars prefer a Greek or Persian origin. The honest answer is that the etymology is genuinely disputed; the name's warmth rests on its apostolic use." and belongs to the Divine cluster — names rooted in sacred meaning and spiritual tradition.
Common among European, Greek families, Thaddeus carries cultural weight that goes beyond its dictionary definition — it's a name with a story and a community.
What would a baby named Thaddeus look like?
NameRoot imagines a one-of-a-kind AI baby portrait for every name, shaped by its heritage — the features, the colouring, the feeling a name like Thaddeus carries. No two are alike.
See Thaddeus's portrait — and its full score — the moment you open the app.
See Thaddeus's baby portrait →What does Thaddeus's numerology say?
Numerology assigns each name a single-digit destiny number by summing its letter values. Different schools use different mappings — NameRoot computes both so you can see how Thaddeus resonates in either tradition.
Thaddeus's destiny number is 1 — but a number only matters in context. The app matches it to your family's own numbers for a real compatibility read. See Thaddeus's full reading →
Does Thaddeus go with your family's names?
Thaddeus breaks into 6 sounds: /TH-AE-D-IY-AH-S/. The real test isn't how it sounds alone — it's how it sounds beside the names already in your family: yours, your partner's, and any brothers or sisters. NameRoot scores that harmony, so Thaddeus sits naturally next to a Mum and Dad like Michael & Anna, or a big sister named Gianna — no awkward clashes, no two names that blur together. Hear Thaddeus beside your family's names →
Nicknames
Common affectionate forms of Thaddeus — useful for everyday family conversation, early childhood, or as standalone given names themselves.
Names similar to Thaddeus
If Thaddeus resonates with you, these names live in the same world — drawn from the same tradition, sharing the same meaning, or echoing a similar sound.
From the same tradition
Other Christian boy names, common in European families
Sharing the same meaning
Other Christian boy names from the Divine cluster
Names that sound similar
Christian boy names that open with the same syllables as Thaddeus
Explore more names
Keep exploring names like Thaddeus — by tradition, by meaning, or by first letter.
Common questions about Thaddeus
What does the name Thaddeus mean?
Thaddeus means "Possibly courageous heart or warm-hearted, from an Aramaic original whose exact form and meaning are uncertain — the name appears in the gospels as an apostle also called Lebbaeus or Judas son of James, and ancient sources proposed Aramaic roots meaning breast or heart (suggesting warmth or courage). Some scholars prefer a Greek or Persian origin. The honest answer is that the etymology is genuinely disputed; the name's warmth rests on its apostolic use.." It is a boy name of Greek origin, traditionally used in Christian families.
Is Thaddeus a boy or girl name?
Thaddeus is most commonly used as a boy name.
What is the origin of the name Thaddeus?
Thaddeus is of Greek origin, used in Christian tradition, commonly among European, Greek families.
Is Thaddeus a Christian name?
Yes. Thaddeus is a boy name traditionally used in Christian families, of Greek origin.
What does Thaddeus mean in Greek?
Thaddeus originates from Greek, where it means "Possibly courageous heart or warm-hearted, from an Aramaic original whose exact form and meaning are uncertain — the name appears in the gospels as an apostle also called Lebbaeus or Judas son of James, and ancient sources proposed Aramaic roots meaning breast or heart (suggesting warmth or courage). Some scholars prefer a Greek or Persian origin. The honest answer is that the etymology is genuinely disputed; the name's warmth rests on its apostolic use.."
What are common nicknames for Thaddeus?
Common short forms of Thaddeus include Thadi, Thad.
What is the numerology of Thaddeus?
Thaddeus has a Pythagorean destiny number of 1 — leadership and pioneering spirit.
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