Boy · #4,535 in 2026

Thadeo

Name: Popularity of the name Thadeo in U.S. births, 1880–2026
Creator: U.S. Social Security Administration
License: https://www.ssa.gov/foia/
Keywords: Thadeo, baby name, popularity, U.S., SSA, rankings

Current Rank

#4,535

Peak Rank

#4,535 (2026)

Total Babies

144

5-Yr Trend

+84%

2014

First Year

2026

Last Year

2026

Peak Year

#4535

Peak Rank

144

Total Count

Years Active

The Story of Thadeo

Thadeo first appeared in U.S. Social Security Administration records as a baby boy name in 2014, with 5 babies given the name that year. The name hit its high-water mark in 2026: 23 births, good for #4,535 nationwide. About 79% of every Thadeo on record arrived during the 2020s, its defining decade. As of 2026, Thadeo ranks #4,535 for baby boys with 23 births, rising sharply (+84% over the past five years). All told, over 144 Americans have carried the name since 1880, from the 2010s to the 2020s.

Popularity Over Time

Popularity by State

Top 10

11-50

51-100

101-500

500+

No data

Names that sound like Thadeo

Phonetically similar names — useful when Thadeo is the vibe but a different syllable count or letter feel might suit better. Linked entries have a profile on Peek a Name.

Tadeo
Thaden
Taddeo
Thadeus
Thada
Madia
Daddio
Medio
Hadiya
Saadia
Cadieux
Zedillo

Source: Datamuse . Phonetic similarity ranking, not curated.

Frequently Asked Questions about Thadeo

What does the name Thadeo mean?

Thadeo is a boy's name that has been used in U.S. records since 2014. Behind the Name doesn't list a specific etymology, but the name has remained in use across multiple decades.

How popular is Thadeo in 2026?

In 2026, Thadeo ranks #4,535 among boys' names in the U.S., with 23 babies given the name that year.

When was Thadeo most popular?

Thadeo reached its peak popularity in 2026, ranking #4,535 that year with 23 babies given the name.

In which U.S. states is Thadeo most popular?

Thadeo has historically been most popular in Texas, California. Rankings vary year to year, but these states show the strongest concentration of births named Thadeo.

Is Thadeo a unisex name?

In U.S. Social Security records, Thadeo is primarily a boy's name. We don't have meaningful data for it as a girl's name.

What names go well with Thadeo?

Names that share a similar style or popularity range with Thadeo include Sequoyah, Roldan, Ondre. These pairings are based on rank proximity and naming era in U.S. data.

About the name Thadeo

Thadeo is a boy baby name tracked by the U.S. Social Security Administration. It first appeared in SSA records in 2014 and has accumulated 144 births in the dataset. Thadeo's peak popularity came in 2026 when it ranked #4,535. Use the chart and map above to compare Thadeo's trajectory across years and U.S. states, or browse the related names section to discover similar choices.

Continue exploring

Data sources

Birth statistics (counts, ranks, years 1880–2026) — U.S. Social Security Administration . Predictions for years not yet released by SSA are computed by Peek a Name from historical trends; we update with official data as soon as it ships.
Etymology, cultural origins, and related forms — Behind the Name (used under their public API terms).
Meaning prose and editorial summary — Wikipedia article extracts, licensed under CC BY-SA 3.0 .
Predicted nationality distribution — Nationalize.io .
Phonetically similar names — Datamuse .

Peek a Name aggregates and presents the above data for informational purposes. Statistical predictions and external attributions are clearly labelled where shown; we make no guarantee of accuracy beyond what each source provides.