Tadeo
Tadeo was the 427th most popular name for boys in 2025, given to 753 babies. Its best year was 2024, when it ranked 412th with 782 babies. Over the last ten years it has moved up 629 places. More babies were named Tadeo in the 2020s than in any other decade.
Meaning Spanish form of Thaddeus · Aramaic, Spanish
Say it tah-DAY-oh /tɑˈdeɪoʊ/
- Rank in 2025
- #427 boys, up 277 places since 2020
- Babies in 2025
- 753boys
- Girls and boys
- Almost always a boy’s name2021–2025
- Peak year
- 2024782 babies
- Total since 1880
- 5,843babies recorded
What does the name Tadeo mean?
Tadeo is the Spanish form of Thaddeus, one of the twelve apostles (also called Jude). DMNES derives Thaddeus from Aramaic, glossing it "(courageous) heart", and records Italian Tadeus and Taddeo from the 13th century; it also notes Thady as an Irish form. Tadeo has become popular in Spanish-speaking families in the US.
תדי (Aramaic, “heart, breast (per DMNES 'courageous heart')”)
How sure is this? Probable. DMNES gives 'heart'; other interpretations of the Aramaic exist.
Related names: Thaddeus, Taddeo, Tad, Teague.
See also: Aramaic names.
Sources for this meaning
- Dictionary of Medieval Names from European Sources (ed. S. L. Uckelman), Edition 2023 no. 1, s.v. 'Thaddeus', DMNES, Durham University
- US Social Security Administration, national baby-name data 1880-2025 (usage history only), US Social Security Administration
Tadeo popularity since 1880
| Year | Rank (boys) | Babies (boys) |
|---|---|---|
| 2025 | #427 | 753 |
| 2020 | #704 | 361 |
| 2010 | #2,257 | 58 |
| 2000 | #6,254 | 11 |
| 1990 | #9,338 | 5 |
| 1980 | — | — |
| 1970 | — | — |
| 1960 | — | — |
| 1950 | — | — |
| 1940 | — | — |
| 1930 | — | — |
| 1920 | — | — |
| 1910 | — | — |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Tadeo, counting every spelling?
Tadeo is the most common spelling of a name family that ranked #428 for boys in 2025 once every spelling is counted together, compared with #427 for Tadeo on its own. Together these spellings went to 753 boys in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Tadeo | 753 | #427 | 3,210 |
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 Tadeo?
753 of the 3,606,400 babies born in the US in 2025 were named Tadeo (0.21 per 1,000 births). For a boy named Tadeo 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 11 (of 430 pupils) would have a child named Tadeo.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Tadeo?
About 5,800 people born in the US named Tadeo are alive today, with a median age of 5; half are between 2 and 9. That makes Tadeo a young name: most people with it are children.
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.
Tadeo by state
How common Tadeo was among boys born in each state in 2021–2025. It is notably more common than nationally in Arizona (2.5×), California (2.5×), Texas (2.3×), Nevada (2.1×), Illinois (1.9×). It is least common, relative to the national rate, in Louisiana, Missouri, Virginia.
Names with a similar history
These names rose and fell in step with Tadeo: their share of US boys followed the most similar curve since 1880. If you like Tadeo, they share its era and feel.
Middle names for Tadeo · Sibling names for Tadeo
Questions about the name Tadeo
What does Tadeo mean?
Tadeo means “Spanish form of Thaddeus” (Aramaic, Spanish origin). Certainty: probable.
How popular is the name Tadeo?
Tadeo was the 427th most popular name for boys in 2025, given to 753 babies. Its best year was 2024, when it ranked 412th with 782 babies. Over the last ten years it has moved up 629 places. More babies were named Tadeo in the 2020s than in any other decade.
Is Tadeo a boy or girl name?
In 2021–2025, almost always a boy’s name given the name Tadeo in the US.
Where is Tadeo most popular?
In 2021–2025, Tadeo was most common in Arizona (0.93 per 1,000 boys), followed by California and Texas.