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Tadeo

#427 in 2025Boys' name

Form of Thaddeus

Tadeo has been given to 5,843 babies in the U.S. since 1968. In 2025 it ranked #427 of 13,926 boys’ names in use. Its peak year was 2024, with 782 recorded.

Babies named Tadeo, 2025

1 in 4,400

Tadeo over time, 1880–2025

Boys
020040060080018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Tadeo: meaning, origin, and history

Form of Thaddeus

Deeper origin not confirmed in the cited records

What Tadeo means

Tadeo is a form of Thaddeus.

Meaning behind the documented name family

The name developed through Tadeo → Thaddeus. The family’s proposed meaning is “heart, breast”, recorded in the naming reference for Thaddeus.

Origin, language, and formation

Tadeo is used in Spanish.

Tadeo comes through Latin Thaddaeus.

Related names and everyday forms

Related names include Thaddeus and Thaddaeus.

Pronunciation and spelling

In Spanish, Tadeo is pronounced /taˈdeo/.

American usage and historical context

In the United States, 5,843 boys were recorded with the name Tadeo between 1968 and 2025. Its highest annual count was 782 in 2024; its best national rank was #412 in 2024.

Over 5 years its rank rose, from #704 in 2020 to #427 in 2025. Over 10 years its rank rose, from #1,056 in 2015 to #427 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Tadeo?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 4,400
753 of 3,315,165 births
Among boys only
1 in 2,270
0.04% of boys
Rank, 2025
#427
of 13,926 boys’ names in use
Coin-flip room size
3,053 kids
Even odds of a second one

Where Tadeo sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 1002%
School of 50011%

Put another way: gather 3,053 children born in 2025 and it's an even bet that one of them is another Tadeo. In a class of 30 the chance is Under 1%.

When Tadeos were born

Half of everyone ever recorded as Tadeo was born before 2021 — so the typical Tadeo is around 4 today.

Median birth year
2021
About 4 years old
Biggest decade
2020s
61.1% of all use
Born in the last 25 years
98.5%
A modern name
Recorded since 1950
5,843
People you could plausibly meet
Choose a decade

2020s — 61.1% of all recorded uses (3,571).

Is Tadeo rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
−15
Places dropped
Rank vs 5 years ago
+277
Places climbed
Rank vs 10 years ago
+629
Places climbed
Births vs 10 years ago
3.98×
More babies than then
Share of its own peak
96.3%
Peak was 2024 (782)
Years since peak
1
Years
Year-to-year steadiness
Shifting
22.1% average annual change
Best rank ever
#412
2024

Spellings of Tadeo

Tadeo is not the most common spelling — Mateo is, with 19.9% against Tadeo's 0.92%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Tadeo is used

Across 2016–2025, Tadeo was most concentrated in Arizona — about 1 in 1,389 boys, against 1 in 3,376 across all states with data. It was least common in Louisiana (1 in 50,000).

272 per 100,000

Most concentrated

  1. 1Arizona1 in 1,389
  2. 2Texas1 in 1,449
  3. 3California1 in 1,639
  4. 4Illinois1 in 2,222
  5. 5Nevada1 in 2,222
  6. 6Colorado1 in 2,500
  7. 7Washington1 in 2,941
  8. 8Oklahoma1 in 3,125

Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings.

Geographically, Tadeo is one of the more regionally concentrated names in the country — more concentrated than 92% of the names used widely enough to compare. See the most regional names

Tadeo around the world

Where Tadeo ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    2017–2025
    #4,275
    in 2025
  • France
    2004–2019
    #3,966
    in 2019
  • Canada
    2018–2023
    #3,103
    in 2023

Popularity data from Office for National Statistics, Institut national de la statistique et des études économiques and Statistics Canada. ONS data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence.

Notable people named Tadeo

People whose public names include Tadeo, backed by Wikidata given-name records and ordered by linked Wikimedia pages. The name may be a middle name.

People data from Wikidata (CC0). Fame is measured, not judged — the order reflects how widely each person is documented, not the U.S. birth records popularity this page is otherwise about.

Tadeo in other languages

Cross-language forms and variants of Tadeo. Linked forms have their own page here.

TadeiTadejTaddeoTadeuszThaddeusThaddaeusTádéTadasTadeuTadeášTadijaThaddéeTadevush

Variant forms from Wikidata (CC0). Most are used mainly outside the United States; U.S. birth records statistics cover US usage only.

Tadeo by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#427
Trend vs 5 yrs ago
Up 277
Best rank ever
#412
2024
Peak year
2024
782 that year
First recorded
1968
Last recorded
2025
All-time count
5,843
Count in 2025
753

Names similar to Tadeo

Matched on shared beginnings and endings, similar length, and comparable popularity.

TadTadhgTadenAmadeoTaddTadashiTaddeoTadaoHideoTadariusTadanTadeuszAmedeoTadeiDeoThadeoTadeyTadehTadejTadghTadeusTadeTadrianTadyn

Names with a curve like Tadeo

Not spelling — timing. These names rose, peaked and faded in the same years as Tadeo, so they read as being from the same moment even when they look nothing alike.

LedgerKodaLianRomeKenzoSuttonShepherdKrewAnderCillianRioSalem

Sibling names for Tadeo

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Tadeo

Top names of 2024, Tadeo's peak yearThe 2020s in fullOther names that peaked in 2024Boys' names starting with TShort Spanish Boy Names