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Jef

Jef is a male given name: 98% of people named Jef are men, and it is recorded as male in 2 of the 2 countries covered.

MaleLow
Male 98%Female 2%

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
Netherlands, United States
US births since 1880
129 male / 0 female
Data
nam_dict (GFDL) + US SSA
Updated
2026-09-11

How to address Jef

When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Jef," in English, "Guten Tag Jef," in German. Jef is a male given name: about 98% of people named Jef are men. A quick look at a profile confirms it for certain.

Ready-made greetings in six languages

English

Dear Jef,

German

Guten Tag Jef,

French

Bonjour Jef,

Spanish

Estimado/a Jef:

Chinese

Jef您好：

Japanese

Jef様

English

Hi Jef,

German

Hi Jef,

French

Salut Jef,

Spanish

Hola Jef,

Chinese

Jef你好：

Japanese

Jefさん

Greeting generator

This is a statistical estimate, not a statement about the gender, identity or correct form of address of any particular person.

Country breakdown

Gender of the name Jef by country (nam_dict, 55 country columns)
CountryHow commonUsuallyMale share
Netherlandsrareman's name98%
United Statesrareman's name100%

United States birth data

129 male · 0 female · 129 births recorded

Male 100%Female 0%

Frequently asked questions

Is Jef a male or female name?

Jef is a male given name: 98% of people named Jef are men, and it is recorded as male in 2 of the 2 countries covered.

How do I address Jef in an email?

When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Jef," in English, "Guten Tag Jef," in German. Jef is a male given name: about 98% of people named Jef are men. A quick look at a profile confirms it for certain.

Is Jef a unisex name?

Jef is not a unisex name: 98% of people named Jef are men. Jef leans strongly male overall.

Related names

AstridFemaleTheoMaleHenkMaleRobMaleJolandaFemaleWimMaleJosMaleEllyFemale

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.

Cite this page

DearWho, "Is Jef a male or female name?", https://dearwho.vercel.app/name/jef (accessed 2026-09-11). Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.

BibTeX
@misc{dearwho_jef,
  title  = {Is Jef a male or female name?},
  author = {{DearWho}},
  year   = {2026},
  url    = {https://dearwho.vercel.app/name/jef},
  note   = {Data: nam_dict (GFDL), US SSA public domain}
}