How to say it
ta · DE · o
tɑːˈdeɪ.oʊ
Masculine
Tadeo
Heart, courageous
What it means
The Spanish form of Thaddeus, an Aramaic name often read as 'heart' or 'courageous.'
Tadeo is the Spanish form of Thaddeus, the Aramaic name of one of the twelve apostles, usually read as 'heart' or 'courageous one.' St. Jude Thaddeus is invoked as the patron of hopeless causes. Tadeo is warm and popular across Latin America, with the friendly shorts Tao and Teo. It pairs the apostolic root with a soft, modern sound.
How to spell Tadeo
The standard spelling is Tadeo. Common variants include Tadeu, Thaddeus, Taddeo, but Tadeo is the most widely used form.
Popularity over time
peaked at #412 in 2024, currently #427 in 2025.
Source: U.S. Social Security Administration, names given to at least 5 babies in a year, 1880–2025. Reviewed July 2026. See where the names are moving
Heads-up notes
- Nickname
Tao and Teo are the shorts.
- Worth knowing
The Spanish Thaddeus (the apostle); common across Latino communities.
Who's worn it
Historical figures, characters, and public faces who share the name. The cultural surface, for whatever weight you want to give it.
- St. Thaddeus one of the twelve apostles, often identified with Jude
Spelling variants
- Tadeu
- Thaddeus
- Taddeo
Names with the same feeling
See Tadeo from another angle
By meaning
By style
Common questions
- What does the name Tadeo mean?
- The Spanish form of Thaddeus, an Aramaic name often read as 'heart' or 'courageous.'
- What does Tadeo mean in Spanish?
- In Spanish, Tadeo means "Heart, courageous." Tadeo is the Spanish form of Thaddeus, the Aramaic name of one of the twelve apostles, usually read as 'heart' or 'courageous one.' St. Jude Thaddeus is invoked as the patron of hopeless causes. Tadeo is warm and popular across Latin America, with the friendly shorts Tao and Teo. It pairs the apostolic root with a soft, modern sound.
- How do you pronounce Tadeo?
- Tadeo is pronounced tɑːˈdeɪ.oʊ. Say it as ta-DE-o, with the stress on the "de" syllable.
- How do you spell Tadeo?
- The standard spelling is Tadeo. Common spelling variants include Tadeu, Thaddeus, Taddeo.
- Is Tadeo a boy or girl name?
- Tadeo is traditionally a masculine name.
- How popular is the name Tadeo?
- Tadeo ranked #427 in the U.S. in 2025, according to Social Security Administration data.