Thaddäus
Thaddäus is classified as a male given name in our dataset. A first name alone does not establish someone’s gender or preferred form of address.
Confidence describes the weight of the source data, not a measured accuracy rate.
- Verdict
- Male
- Confidence
- Medium (source weight 8 to 63; not an accuracy rate)
- High source frequency in
- United States, Austria, Switzerland
- US records 1880–2017
- 909 male / 0 female
- Data
- nam_dict (GFDL) + US SSA
- Dataset built
- 2026-09-11
How to address Thaddäus
If you do not know Thaddäus’s preferred form of address, use a greeting without Mr or Ms: “Dear Thaddäus,” in English, “Guten Tag Thaddäus,” in German. Include their family name if you know it. The name’s classification describes its usage. Follow the form of address the person uses for themselves.
Ready-made greetings in six languages
English
Dear Thaddäus,
German
Guten Tag Thaddäus,
French
Bonjour Thaddäus,
Spanish
Estimado/a Thaddäus:
Chinese
Thaddäus您好：
Japanese
Thaddäus様
English
Hi Thaddäus,
German
Hi Thaddäus,
French
Salut Thaddäus,
Spanish
Hola Thaddäus,
Chinese
Thaddäus你好：
Japanese
Thaddäusさん
This is a statistical estimate, not a statement about the gender, identity or correct form of address of any particular person.
Country breakdown
| Country | How common | Usually |
|---|---|---|
| United States | uncommon | man's name |
| Austria | rare | man's name |
| Switzerland | rare | man's name |
| Germany | rare | man's name |
United States birth data
909 male · 0 female · 909 births recorded
Records from 1980–2017: 100% male.
Frequently asked questions
Is Thaddäus a male or female name?
Thaddäus is classified as a male given name in our dataset. A first name alone does not establish someone’s gender or preferred form of address.
How do I address Thaddäus in an email?
If you do not know Thaddäus’s preferred form of address, use a greeting without Mr or Ms: “Dear Thaddäus,” in English, “Guten Tag Thaddäus,” in German. Include their family name if you know it. The name’s classification describes its usage. Follow the form of address the person uses for themselves.
Is Thaddäus a unisex name?
Thaddäus is classified as generally male in the combined dataset. This does not rule out other uses. Our categories describe the sources, rather than a complete survey of everyone with this name.
Related names
Sources
Gender by country: nam_dict, the c't first-names dictionary by Joerg Michael, roughly 44,000 names across 55 countries, licensed GFDL. US frequencies: United States Social Security Administration baby-name data (1880–2017), public domain. Classifications are not measured accuracy rates. Method: how we classify names. Full dataset: data & licences. US source data (babynames). Dataset built 2026-09-11; this is not a new collection date for the source records.
DearWho, "Is Thaddäus a male or female name?", https://www.dearwho.app/name/thaddaeus. Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_thaddaeus,
title = {Is Thaddäus a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://www.dearwho.app/name/thaddaeus},
note = {Data: nam_dict (GFDL), US SSA public domain}
}