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2025 data, released 8 May 2026

2025 data, released 8 May 2026

Thadeus

Thadeus was the 11845th most popular name for boys in 2025, given to 6 babies. Its best year was 1918, when it ranked 1398th with 27 babies. Over the last ten years it has moved down 3,175 places. More babies were named Thadeus in the 2000s than in any other decade.

Meaning (as Thaddeus) name of an apostle (origin uncertain) · Greek, Aramaic

Rank in 2025
#11,845 boys
Babies in 2025
6boys
Girls and boys
Almost always a boy’s name2021–2025
Peak year
191827 babies
Total since 1880
1,123babies recorded

What does the name Thadeus mean?

Thadeus is a spelling of Thaddeus, pronounced the same way, so it shares Thaddeus's meaning and origin.

Thaddeus is the Latin and English form of Greek Thaddaios, one of the twelve apostles in Mark 3:18 and Matthew 10:3, usually identified with Jude. The origin of the name is uncertain. It may be an Aramaic name, perhaps linked to a word for 'breast' or 'heart', or a Greek name shortened from Theodotos or Theodoros 'gift of God'. Thaddeus was used in Poland and Ireland and later in the US.

Θαδδαῖος (Thaddaios) (Koine Greek, “Thaddaeus”)

How sure is this? Uncertain. Both an Aramaic and a Greek origin have been proposed; none is established.

Related names: Thaddaeus, Tadeo, Tadeusz, Thad, Tad.

See also: Greek names.

Sources for this meaning

Thadeus popularity since 1880

012.52537.550 1900192019401960198020002020
Boys Babies per year, US, from Social Security records. Years with fewer than 5 babies show as zero.
YearRank (boys)Babies (boys)
2025#11,8456
2020——
2010#6,66313
2000#5,01615
1990#3,45118
1980#4,8978
1970——
1960——
1950——
1940#3,8915
1930#2,9969
1920#2,11916
1910——
1900——
1890——
1880——

How popular is Thadeus, counting every spelling?

Thadeus is a spelling of Thaddeus, a name family that ranked #773 for boys in 2025 once every spelling is counted together, compared with #11,845 for Thadeus on its own. Together these spellings went to 320 boys in 2025.

SpellingBabies 2025Official rankBabies 2021–2025
Thaddeus314#7981,463

Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.

How many kids will share the name Thadeus?

6 of the 3,606,400 babies born in the US in 2025 were named Thadeus (0.00 per 1,000 births). For a boy named Thadeus born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 1,368 (of 430 pupils) would have a child named Thadeus.

Chance of another Thadeus in a class of 20under 1 in 50US, born 2025

Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.

How old are people named Thadeus?

About 800 people born in the US named Thadeus are alive today, with a median age of 33; half are between 21 and 48. That makes Thadeus mostly worn by adults in their thirties to fifties.

0–910–1920–2930–3940–4950–5960–6970–7980–8990+
Estimated people alive in the US with the name, by age, mid-2026. The darker bar holds the median age.

Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.

Thadeus by state

How common Thadeus was among boys born in each state in 1916–1920, around its peak. In 48 states fewer than five boys a year got the name, too few for SSA to publish, so those states show as zero.

Alaska: fewer than 5 a yearAK–Maine: fewer than 5 a yearME–Wisconsin: 0.05 per 1,000 babiesWI0.05Vermont: fewer than 5 a yearVT–New Hampshire: fewer than 5 a yearNH–Washington: fewer than 5 a yearWA–Idaho: fewer than 5 a yearID–Montana: fewer than 5 a yearMT–North Dakota: fewer than 5 a yearND–Minnesota: fewer than 5 a yearMN–Illinois: 0.02 per 1,000 babiesIL0.02Michigan: fewer than 5 a yearMI–New York: fewer than 5 a yearNY–Massachusetts: fewer than 5 a yearMA–Oregon: fewer than 5 a yearOR–Nevada: fewer than 5 a yearNV–Wyoming: fewer than 5 a yearWY–South Dakota: fewer than 5 a yearSD–Iowa: fewer than 5 a yearIA–Indiana: fewer than 5 a yearIN–Ohio: fewer than 5 a yearOH–Pennsylvania: 0.01 per 1,000 babiesPA0.01New Jersey: fewer than 5 a yearNJ–Connecticut: fewer than 5 a yearCT–Rhode Island: fewer than 5 a yearRI–California: fewer than 5 a yearCA–Utah: fewer than 5 a yearUT–Colorado: fewer than 5 a yearCO–Nebraska: fewer than 5 a yearNE–Missouri: fewer than 5 a yearMO–Kentucky: fewer than 5 a yearKY–West Virginia: fewer than 5 a yearWV–Virginia: fewer than 5 a yearVA–Maryland: fewer than 5 a yearMD–Delaware: fewer than 5 a yearDE–Arizona: fewer than 5 a yearAZ–New Mexico: fewer than 5 a yearNM–Kansas: fewer than 5 a yearKS–Arkansas: fewer than 5 a yearAR–Tennessee: fewer than 5 a yearTN–North Carolina: fewer than 5 a yearNC–South Carolina: fewer than 5 a yearSC–District of Columbia: fewer than 5 a yearDC–Oklahoma: fewer than 5 a yearOK–Louisiana: fewer than 5 a yearLA–Mississippi: fewer than 5 a yearMS–Alabama: fewer than 5 a yearAL–Georgia: fewer than 5 a yearGA–Hawaii: fewer than 5 a yearHI–Texas: fewer than 5 a yearTX–Florida: fewer than 5 a yearFL–
Babies per 1,000 of the same sex, Thadeus, boys, 1916–1920. Darker means more common.

Names with a similar history

These names rose and fell in step with Thadeus: their share of US boys followed the most similar curve since 1880. If you like Thadeus, they share its era and feel.

Questions about the name Thadeus

What does Thadeus mean?

Thadeus is a spelling of Thaddeus, usually explained as “name of an apostle (origin uncertain)”, but this is uncertain. Certainty: uncertain.

How popular is the name Thadeus?

Thadeus was the 11845th most popular name for boys in 2025, given to 6 babies. Its best year was 1918, when it ranked 1398th with 27 babies. Over the last ten years it has moved down 3,175 places. More babies were named Thadeus in the 2000s than in any other decade.

Is Thadeus a boy or girl name?

In 2021–2025, almost always a boy’s name given the name Thadeus in the US.

Where was Thadeus most popular?

In 1916–1920, Thadeus was most common in Wisconsin (0.05 per 1,000 boys), followed by Illinois and Pennsylvania.