Rieko
Rieko is a female given name: 92% of people named Rieko are women, and it is recorded as female in 1 of the 2 countries covered.
- Verdict
- Female
- Male / female split
- 8% male / 92% female
- Confidence
- Medium (8 to 63 weighted country observations)
- Most common in
- Japan, East Frisia
- Data
- nam_dict (GFDL) + US SSA
- Updated
- 2026-09-11
How to address Rieko
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Rieko," in English, "Guten Tag Rieko," in German. Rieko is a female given name: about 92% of people named Rieko are women. A quick look at a profile confirms it for certain.
Ready-made greetings in six languages
English
Dear Rieko,
German
Guten Tag Rieko,
French
Bonjour Rieko,
Spanish
Estimado/a Rieko:
Chinese
Rieko您好：
Japanese
Rieko様
English
Hi Rieko,
German
Hi Rieko,
French
Salut Rieko,
Spanish
Hola Rieko,
Chinese
Rieko你好：
Japanese
Rieko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 |
|---|---|---|---|
| Japan | uncommon | woman's name | 2% |
| East Frisia | rare | man's name | 98% |
Frequently asked questions
Is Rieko a male or female name?
Rieko is a female given name: 92% of people named Rieko are women, and it is recorded as female in 1 of the 2 countries covered.
How do I address Rieko in an email?
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Rieko," in English, "Guten Tag Rieko," in German. Rieko is a female given name: about 92% of people named Rieko are women. A quick look at a profile confirms it for certain.
Is Rieko a unisex name?
Rieko is not a unisex name: 8% of people named Rieko are men. Rieko leans strongly female 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 Rieko a male or female name?", https://dearwho.vercel.app/name/rieko (accessed 2026-09-11). Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_rieko,
title = {Is Rieko a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://dearwho.vercel.app/name/rieko},
note = {Data: nam_dict (GFDL), US SSA public domain}
}