Klaas
Klaas is a male given name: 98% of people named Klaas are men, and it is recorded as male in 3 of the 3 countries covered.
- Verdict
- Male
- Male / female split
- 98% male / 2% female
- Confidence
- High (64 or more weighted country observations)
- Most common in
- Netherlands, East Frisia, Belgium
- Data
- nam_dict (GFDL) + US SSA
- Updated
- 2026-09-11
How to address Klaas
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Klaas," in English, "Guten Tag Klaas," in German. Klaas is a male given name: about 98% of people named Klaas are men. A quick look at a profile confirms it for certain.
Ready-made greetings in six languages
English
Dear Klaas,
German
Guten Tag Klaas,
French
Bonjour Klaas,
Spanish
Estimado/a Klaas:
Chinese
Klaas您好：
Japanese
Klaas様
English
Hi Klaas,
German
Hi Klaas,
French
Salut Klaas,
Spanish
Hola Klaas,
Chinese
Klaas你好：
Japanese
Klaas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 |
|---|---|---|---|
| Netherlands | common | man's name | 98% |
| East Frisia | uncommon | man's name | 98% |
| Belgium | rare | man's name | 98% |
Frequently asked questions
Is Klaas a male or female name?
Klaas is a male given name: 98% of people named Klaas are men, and it is recorded as male in 3 of the 3 countries covered.
How do I address Klaas in an email?
When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Klaas," in English, "Guten Tag Klaas," in German. Klaas is a male given name: about 98% of people named Klaas are men. A quick look at a profile confirms it for certain.
Is Klaas a unisex name?
Klaas is not a unisex name: 98% of people named Klaas are men. Klaas 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 Klaas a male or female name?", https://dearwho.vercel.app/name/klaas (accessed 2026-09-11). Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.
BibTeX
@misc{dearwho_klaas,
title = {Is Klaas a male or female name?},
author = {{DearWho}},
year = {2026},
url = {https://dearwho.vercel.app/name/klaas},
note = {Data: nam_dict (GFDL), US SSA public domain}
}