boy's name
Tadeo
tah-DEH-oh
- Origin Aramaic
- Gender Boy
- Letters 5
- Popularity Top 1000 (US)
- Births on record 5,944
the United States
#427
2025 births
Tadeo is a boy's name, the Spanish form of Thaddeus. Its meaning is genuinely unknown: the name is Aramaic, and the readings of heart, courageous and praise offered by name sites are guesses at a word we cannot recover.
- Tadeo is a name of Aramaic origin.
- Peaked in 2024, when 782 babies were given the name.
- It has been rising over the past decade.
- Today about 1 in 4,403 babies in the United States is given this name.
- First appears in US birth records in 1968.
Tadeo over time
Births per decade in the United States, 1960s to 2020s. The striped bar is the 2020s, still in progress — it covers 2020 to 2025, not a full ten years.
Show the numbers
| Decade | Births |
|---|---|
| 1960s | 5 |
| 1980s | 19 |
| 1990s | 53 |
| 2000s | 348 |
| 2010s | 1,847 |
| 2020s (to 2025) | 3,571 |
What Tadeo means
Tadeo has no established meaning. Thaddeus is Aramaic, and proposals connect it to words for the heart and for praise, but none is secure — the name reaches us only through Greek transliteration.
Where Tadeo comes from
Tadeo is the Spanish form of Thaddeus, from the Greek Thaddaios, itself rendering an Aramaic name we know only in that transliteration. Proposed roots include an Aramaic word for the heart or breast and a shortening of a longer name meaning praise, but no derivation is established. Thaddeus is listed among the twelve apostles in Matthew and Mark, where Luke and Acts have Jude of James instead, and Christian tradition generally treats them as one man, which is why he is Jude Thaddeus. Spanish gives Tadeo, Italian Taddeo, Polish Tadeusz. It appears in our records from 1968.
Tadeo in use
Tadeo charts in only two of the seven countries we track and peaked in 2024.
How popular is Tadeo?
In 2025, Tadeo was given to 753 babies in the United States, ranking #427 that year. It is a well-established, commonly used name.
Where Tadeo is used
US figures omit any name given to fewer than five babies in a year, so the rarest names are absent from the source rather than absent from use. Data & sources.
How Tadeo is spelled
Birth registers count each spelling separately, so every one has its own ranking.
| Spelling | What it is | Births on record |
|---|---|---|
| Tadéo | Tadéo is a rare spelling of Tadeo, written with an acute accent and recorded about 5 times, mostly in France. | 5 |
Names that peaked alongside Tadeo
These names rose and fell in the same era, which is why they tend to sound like they belong together.
Parents who like Tadeo also like
Names whose popularity has risen and fallen in step with Tadeo over the last century — the same taste, a different name.
2 nicknames for Tadeo
Each one is a name in its own right — the figure underneath is how it is doing today, so you can see which short forms are rising and which have faded.
Tadeo in other languages
The same name as it is spelled elsewhere — not shortenings, and not different names that merely sound alike. Each one has its own record here.
Sibling names for Tadeo
Names from the same era that won't rhyme or share an initial with Tadeo — the two things that make a sibling set grate.
Common questions about Tadeo
What does the name Tadeo mean?
It is unknown. Thaddeus is Aramaic and reaches us only through Greek, so the heart and praise readings are guesses.
Is Tadeo the Spanish Thaddeus?
Yes. Italian gives Taddeo and Polish Tadeusz.
Who was Thaddeus in the Bible?
An apostle listed in Matthew and Mark, generally identified with Jude of James — hence Jude Thaddeus.
How popular is the name Tadeo?
In 2025, Tadeo was given to 753 babies in the United States, ranking #427 that year. It is a well-established, commonly used name.
Is Tadeo a girl's or a boy's name?
Tadeo is given almost entirely to boys in birth records.
When was Tadeo most popular?
Tadeo peaked in 2024, when 782 babies were given the name. It has been rising over the past decade.
What are the nicknames for Tadeo?
Tadeo is usually shortened to Tade and Teo.
Is Tadeo a good name?
That is not something records can settle, but they can tell you what you would be choosing. Tadeo currently ranks #427 in the United States. It has been rising over the past decade. Everything else — how it sounds with your surname, who it reminds you of — is yours.