Sebastain
Sebastain is a male given name: 100% of people named Sebastain 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
- 100% male / 0% female
- Confidence
- Low (fewer than 8 weighted country observations)
- Most common in
- United States
- US births since 1880
- 431 male / 0 female
- Data
- nam_dict (GFDL) + US SSA
- Updated
- 2026-09-11
How to address Sebastain
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Sebastain," in English, "Guten Tag Sebastain," in German. Sebastain is a male given name: about 100% of people named Sebastain are men. A quick look at a profile confirms it for certain.
Ready-made greetings in six languages
English
Dear Sebastain,
German
Guten Tag Sebastain,
French
Bonjour Sebastain,
Spanish
Estimado/a Sebastain:
Chinese
Sebastain您好：
Japanese
Sebastain様
English
Hi Sebastain,
German
Hi Sebastain,
French
Salut Sebastain,
Spanish
Hola Sebastain,
Chinese
Sebastain你好：
Japanese
Sebastain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 |
|---|---|---|---|
| United States | rare | man's name | 100% |
United States birth data
431 male · 0 female · 431 births recorded
Since 1980: 100% male.
Frequently asked questions
Is Sebastain a male or female name?
Sebastain is a male given name: 100% of people named Sebastain are men, and it is recorded as male in 1 of the 1 countries covered.
How do I address Sebastain in an email?
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Sebastain," in English, "Guten Tag Sebastain," in German. Sebastain is a male given name: about 100% of people named Sebastain are men. A quick look at a profile confirms it for certain.
Is Sebastain a unisex name?
Sebastain is not a unisex name: 100% of people named Sebastain are men. Sebastain 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 Sebastain a male or female name?", https://dearwho.vercel.app/name/sebastain (accessed 2026-09-11). Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_sebastain,
title = {Is Sebastain a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://dearwho.vercel.app/name/sebastain},
note = {Data: nam_dict (GFDL), US SSA public domain}
}