Si
Si is a unisex given name: about 68% of people named Si are men and 32% are women, so a gendered salutation is a coin flip and the neutral form is the safe choice.
- Verdict
- Mostly male
- Male / female split
- 68% male / 32% female
- Confidence
- Medium (8 to 63 weighted country observations)
- Most common in
- Vietnam, Korea, United States
- US births since 1880
- 165 male / 19 female
- Data
- nam_dict (GFDL) + US SSA
- Updated
- 2026-09-11
How to address Si
To address Si when you do not know their gender, use the full name with no title: "Dear Si," in English, "Guten Tag Si," in German. About 68% of people named Si are men and 32% are women, so a gendered salutation is close to a coin flip, and the neutral form above is the safer choice.
Ready-made greetings in six languages
English
Dear Si,
German
Guten Tag Si,
French
Bonjour Si,
Spanish
Estimado/a Si:
Chinese
Si您好：
Japanese
Si様
English
Hi Si,
German
Hi Si,
French
Salut Si,
Spanish
Hola Si,
Chinese
Si你好：
Japanese
Si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 |
|---|---|---|---|
| Vietnam | uncommon | man's name | 75% |
| Korea | uncommon | unisex name | 50% |
| United States | rare | man's name | 90% |
| China | rare | unisex name | 50% |
United States birth data
165 male · 19 female · 184 births recorded
Since 1980: 87% male.
Frequently asked questions
Is Si a male or female name?
Si is a unisex given name: about 68% of people named Si are men and 32% are women, so a gendered salutation is a coin flip and the neutral form is the safe choice.
How do I address Si in an email?
To address Si when you do not know their gender, use the full name with no title: "Dear Si," in English, "Guten Tag Si," in German. About 68% of people named Si are men and 32% are women, so a gendered salutation is close to a coin flip, and the neutral form above is the safer choice.
Is Si a unisex name?
Si is not a unisex name: 68% of people named Si are men. Si 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 Si a male or female name?", https://dearwho.vercel.app/name/si (accessed 2026-09-11). Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_si,
title = {Is Si a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://dearwho.vercel.app/name/si},
note = {Data: nam_dict (GFDL), US SSA public domain}
}