Given name
Thaddaeus
“having heart”
In English use, Thaddaeus has a related form in Thaddeus. One Aramaic interpretation is “having heart.” Its derivation is not certain.
Original GreekΘαδδαιος
Meaning & origin
What it means
In English use, Thaddaeus has a related form in Thaddeus. One Aramaic interpretation is “having heart.” Its derivation is not certain.
Explained through its name family
Where it comes from
In English use, Thaddaeus has a related form in Thaddeus. Thaddeus has been associated with Aramaic and Greek naming traditions. The precise derivation is uncertain.
Explained through its name family
How it developed
In English usage, Thaddaeus developed from Θαδδαῖος.
The story
Published U.S. birth records include this spelling as early as 1924. This is the earliest published observation available here, rather than a date for the name’s origin.
From dated birth records
In the Bible
In the Bible, the name Thaddaeus appears in Matthew 10:3, Mark 3:18.
- Matthew 10:3
- Mark 3:18
From biblical name research
Thaddaeus through the years
- Babies since 1880
- 1,045
- 1,045 boys · 0 girls
- Most popular year
- 2005
- 29 babies
- 2025
- 10
- #8,185 for boys
- 2021–25 vs 2016–20
- −26%
- Easing
By the numbers
In 2025, this name appeared in 10 U.S. birth records for boys, ranking No. 8,185 among boys’ names. Average annual use for boys was 25.7% lower in 2021–2025 than in 2016–2020. Published U.S. population figures for this spelling include 823 as a first name in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Thaddaeus’s family of names
In English usage, Thaddaeus has a diminutive in Tad. In English usage, Thaddaeus developed from the Ancient Greek form Θαδδαῖος. In English usage, Thaddaeus has a related form in Thaddeus.
Inner ring: spellings · middle: nicknames and forms · outer: across languages.
Around the world
Thaddaeus has relatives in 11 languages.
13 related names in 11 languages. Point at a dot, or tab to the map and use the arrow keys.
Nicknames & forms 3
Diminutives, pet forms, short forms and variants used alongside the name.
Spellings & scripts 1
The same name written differently, including transliterations into other scripts.
Across languages 15
Equivalents and cognates in other languages, plus older forms it grew from.
See also 12
Names our sources mention alongside this one. They are related in story or meaning, not forms of this name.
People named Thaddaeus
Listed by how widely each person is written about, which says nothing about the name itself.
Similar names
If you love Thaddaeus, these share its style, era, origin or sound, from outside its own family.
Adan
“man” · “of the earth”
99% boys · 1% girls
Aryan
“noble; noble one”
94% boys · 6% girls
Tomas
“twin”
>99% boys
Andy
“manly; a warrior” · “manliness”
96% boys · 4% girls
Davis
“the son of David”
95% boys · 5% girls
Trace
“one who is warlike” · “a woman warrior”
>99% boys
Arturo
“strong as a bear”
>99% boys
Ahmad
“more commendable” · “most praiseworthy”
>99% boys