Thelonious
Thelonious 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
- 336 male / 0 female
- Data
- nam_dict (GFDL) + US SSA
- Dataset built
- 2026-09-11
How to address Thelonious
If you do not know Thelonious’s preferred form of address, use a greeting without Mr or Ms: “Dear Thelonious,” in English, “Guten Tag Thelonious,” 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 Thelonious,
German
Guten Tag Thelonious,
French
Bonjour Thelonious,
Spanish
Estimado/a Thelonious:
Chinese
Thelonious您好：
Japanese
Thelonious様
English
Hi Thelonious,
German
Hi Thelonious,
French
Salut Thelonious,
Spanish
Hola Thelonious,
Chinese
Thelonious你好：
Japanese
Thelonious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
336 male · 0 female · 336 births recorded
Records from 1980–2017: 100% male.
Frequently asked questions
Is Thelonious a male or female name?
Thelonious 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 Thelonious in an email?
If you do not know Thelonious’s preferred form of address, use a greeting without Mr or Ms: “Dear Thelonious,” in English, “Guten Tag Thelonious,” 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 Thelonious a unisex name?
Thelonious 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 Thelonious a male or female name?", https://www.dearwho.app/name/thelonious. Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_thelonious,
title = {Is Thelonious a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://www.dearwho.app/name/thelonious},
note = {Data: nam_dict (GFDL), US SSA public domain}
}