Theodore

Theodore is a male given name: 100% of people named Theodore are men, and it is recorded as male in 5 of the 7 countries covered.

MaleHigh

Male 100%Female 0%

Theodore · Théodore

Verdict: Male
Male / female split: 100% male / 0% female
Confidence: High (64 or more weighted country observations)
Most common in: United States, Luxembourg, France
Also spelled: Théodore
US births since 1880: 236,523 male / 894 female
Data: nam_dict (GFDL) + US SSA
Updated: 2026-09-11

How to address Theodore

When you do not know their gender for certain, the full name with no title is the safe choice: "Dear Theodore," in English, "Guten Tag Theodore," in German. Theodore is a male given name: about 100% of people named Theodore are men. A quick look at a profile confirms it for certain.

Ready-made greetings in six languages

English

Dear Theodore,

German

Guten Tag Theodore,

French

Bonjour Theodore,

Spanish

Estimado/a Theodore:

Chinese

Theodore您好：

Japanese

Theodore様

English

Hi Theodore,

German

Hi Theodore,

French

Salut Theodore,

Spanish

Hola Theodore,

Chinese

Theodore你好：

Japanese

Theodore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 Theodore by country (nam_dict, 55 country columns)
Country	How common	Usually	Male share
United States	very common	man's name	100%
Luxembourg	uncommon	man's name	98%
France	rare	man's name	98%
Switzerland	rare	man's name	98%
Germany	rare	woman's name	2%
East Frisia	rare	woman's name	2%
Great Britain	rare	man's name	98%

United States birth data

236,523 male · 894 female · 237,417 births recorded

Male 100%Female 0%

Since 1980: 100% male.

Frequently asked questions

Is Theodore a male or female name?

Theodore is a male given name: 100% of people named Theodore are men, and it is recorded as male in 5 of the 7 countries covered.

How do I address Theodore in an email?

Is Theodore a unisex name?

Theodore is not a unisex name: 100% of people named Theodore are men. Theodore leans strongly male overall.

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

BibTeX

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