Sidónio
Sidónio is a male given name: 98% of people named Sidónio are men, and it is recorded as male in 1 of the 1 countries covered.
We have limited data on this name. Treat the verdict as a lead, not a certainty.
- Verdict
- Male
- Male / female split
- 98% male / 2% female
- Confidence
- Low (fewer than 8 weighted country observations)
- Most common in
- Portugal
- Data
- nam_dict (GFDL) + US SSA
- Updated
- 2026-09-11
How to address Sidónio
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Sidónio," in English, "Guten Tag Sidónio," in German. Sidónio is a male given name: about 98% of people named Sidónio are men. A quick look at a profile confirms it for certain.
Ready-made greetings in six languages
English
Dear Sidónio,
German
Guten Tag Sidónio,
French
Bonjour Sidónio,
Spanish
Estimado/a Sidónio:
Chinese
Sidónio您好：
Japanese
Sidónio様
English
Hi Sidónio,
German
Hi Sidónio,
French
Salut Sidónio,
Spanish
Hola Sidónio,
Chinese
Sidónio你好：
Japanese
Sidónio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 | Male share |
|---|---|---|---|
| Portugal | rare | man's name | 98% |
Frequently asked questions
Is Sidónio a male or female name?
Sidónio is a male given name: 98% of people named Sidónio are men, and it is recorded as male in 1 of the 1 countries covered.
How do I address Sidónio in an email?
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Sidónio," in English, "Guten Tag Sidónio," in German. Sidónio is a male given name: about 98% of people named Sidónio are men. A quick look at a profile confirms it for certain.
Is Sidónio a unisex name?
Sidónio is not a unisex name: 98% of people named Sidónio are men. Sidónio leans strongly male overall.
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, public domain. Method: how we classify names. Full dataset: data & licences. Data built 2026-09-11.
DearWho, "Is Sidónio a male or female name?", https://dearwho.vercel.app/name/sidonio (accessed 2026-09-11). Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_sidonio,
title = {Is Sidónio a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://dearwho.vercel.app/name/sidonio},
note = {Data: nam_dict (GFDL), US SSA public domain}
}