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Tadej

#11,820 in 2025Boys' name

English equivalent of Thaddeus

Tadej has been given to 6 babies in the U.S. since 2025. In 2025 it ranked #11,820 of 13,926 boys’ names in use. Its peak year was 2025, with 6 recorded.

Babies named Tadej, 2025

1 in 553,000

Tadej over time, 1880–2025

Boys
024618801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Tadej: meaning, origin, and history

English equivalent of Thaddeus

Deeper origin not confirmed in the cited records

What Tadej means

Tadej is a English equivalent of Thaddeus.

Origin, language, and formation

Tadej is used in Slovene.

Related names and everyday forms

Related names include Thaddeus.

Pronunciation and spelling

In Slovene, Tadej is pronounced /tadɛ́ːj/.

American usage and historical context

In the United States, 6 boys were recorded with the name Tadej between 2025 and 2025. Its highest annual count was 6 in 2025; its best national rank was #11,820 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 Tadej?

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

Among all babies, 2025
1 in 553,000
6 of 3,315,165 births
Among boys only
1 in 285,000
<0.01% of boys
Rank, 2025
#11,820
of 13,926 boys’ names in use
Coin-flip room size
382,984 kids
Even odds of a second one

Where Tadej 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 100Under 1%
School of 500Under 1%

Put another way: gather 382,984 children born in 2025 and it's an even bet that one of them is another Tadej. In a class of 30 the chance is Under 1%.

When Tadejs were born

Half of everyone ever recorded as Tadej was born before 2025 — so the typical Tadej is around 0 today.

Median birth year
2025
About 0 years old
Biggest decade
2020s
100.0% of all use
Born in the last 25 years
100.0%
A modern name
Recorded since 1950
6
People you could plausibly meet
Choose a decade

2020s — 100.0% of all recorded uses (6).

Is Tadej 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
—
Not ranked then
Rank vs 5 years ago
New entry
Not ranked then
Rank vs 10 years ago
—
Not ranked then
Births vs 10 years ago
—
Not published both years
Share of its own peak
100.0%
Peak was 2025 (6)
Years since peak
Peaking now
At its all-time high
Year-to-year steadiness
Not enough data
Too few years
Best rank ever
#11,820
2025

Spellings of Tadej

Tadej is not the most common spelling — Jaden is, with 17.2% against Tadej's <0.01%.

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.

Tadej around the world

Where Tadej 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.

  • France
    2024–2024
    #5,363
    in 2024

Popularity data from Institut national de la statistique et des études économiques. INSEE data under Licence Ouverte / Etalab 2.0.

Tadej by the numbers

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

As a boy's name

Rank in 2025
#11,820
Trend vs 5 yrs ago
New entry
Best rank ever
#11,820
2025
Peak year
2025
6 that year
First recorded
2025
Last recorded
2025
All-time count
6
Count in 2025
6

Names similar to Tadej

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

TadeyTadeiTadynTadeasTadghTadrianTadehTaddeoTadarianTadeTadeusTadenTadanTadhgTadariousTadayoshiTadaoTadashiTadariusTadarriusTadeoTadeuszTaddTad

Sibling names for Tadej

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 Tadej

Top names of 2025, Tadej's peak yearThe 2020s in fullOther names that peaked in 2025Boys' names starting with TSlovenian Boy NamesSlovenian Names