Thadius
Thadius 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.
We have limited data on this name. Treat the verdict as a lead, not a certainty.
- Verdict
- Male
- Confidence
- Low (source weight below 8; not an accuracy rate)
- High source frequency in
- United States
- US records 1880–2017
- 487 male / 0 female
- Data
- nam_dict (GFDL) + US SSA
- Dataset built
- 2026-09-11
How to address Thadius
If you do not know Thadius’s preferred form of address, use a greeting without Mr or Ms: “Dear Thadius,” in English, “Guten Tag Thadius,” 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 Thadius,
German
Guten Tag Thadius,
French
Bonjour Thadius,
Spanish
Estimado/a Thadius:
Chinese
Thadius您好：
Japanese
Thadius様
English
Hi Thadius,
German
Hi Thadius,
French
Salut Thadius,
Spanish
Hola Thadius,
Chinese
Thadius你好：
Japanese
Thadius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 | rare | man's name |
United States birth data
487 male · 0 female · 487 births recorded
Records from 1980–2017: 100% male.
Frequently asked questions
Is Thadius a male or female name?
Thadius 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 Thadius in an email?
If you do not know Thadius’s preferred form of address, use a greeting without Mr or Ms: “Dear Thadius,” in English, “Guten Tag Thadius,” 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 Thadius a unisex name?
Thadius 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 Thadius a male or female name?", https://www.dearwho.app/name/thadius. Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_thadius,
title = {Is Thadius a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://www.dearwho.app/name/thadius},
note = {Data: nam_dict (GFDL), US SSA public domain}
}