Isaias

Isaias is a male given name: 100% of people named Isaias are men, and it is recorded as male in 3 of the 3 countries covered.

MaleHigh

Male 100%Female 0%

Isaias · Isaías

Verdict: Male
Male / female split: 100% male / 0% female
Confidence: High (64 or more weighted country observations)
Most common in: United States, Spain, Portugal
Also spelled: Isaías
US births since 1880: 13,427 male / 0 female
Data: nam_dict (GFDL) + US SSA
Updated: 2026-09-11

How to address Isaias

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

Ready-made greetings in six languages

English

Dear Isaias,

German

Guten Tag Isaias,

French

Bonjour Isaias,

Spanish

Estimado/a Isaias:

Chinese

Isaias您好：

Japanese

Isaias様

English

Hi Isaias,

German

Hi Isaias,

French

Salut Isaias,

Spanish

Hola Isaias,

Chinese

Isaias你好：

Japanese

Isaias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 Isaias by country (nam_dict, 55 country columns)
Country	How common	Usually	Male share
United States	common	man's name	100%
Spain	rare	man's name	98%
Portugal	rare	man's name	98%

United States birth data

13,427 male · 0 female · 13,427 births recorded

Male 100%Female 0%

Since 1980: 100% male.

Frequently asked questions

Is Isaias a male or female name?

Isaias is a male given name: 100% of people named Isaias are men, and it is recorded as male in 3 of the 3 countries covered.

How do I address Isaias in an email?

Is Isaias a unisex name?

Isaias is not a unisex name: 100% of people named Isaias are men. Isaias 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 Isaias a male or female name?", https://dearwho.vercel.app/name/isaias (accessed 2026-09-11). Data: nam_dict (J. Michael, GFDL) and US SSA, built 2026-09-11.

BibTeX

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