Isaias
Isaias is classified as a male given name in our dataset. A first name alone does not establish someone’s gender or preferred form of address.
Confidence describes the weight of the source data, not a measured accuracy rate.
Isaias · Isaías
- Verdict
- Male
- Confidence
- High (source weight of at least 64; not an accuracy rate)
- High source frequency in
- United States, Spain, Portugal
- Also spelled
- Isaías
- US records 1880–2017
- 13,427 male / 0 female
- Data
- nam_dict (GFDL) + US SSA
- Dataset built
- 2026-09-11
How to address Isaias
If you do not know Isaias’s preferred form of address, use a greeting without Mr or Ms: “Dear Isaias,” in English, “Guten Tag Isaias,” in German. Include their family name if you know it. The name’s classification describes its usage. Follow the form of address the person uses for themselves.
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
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 |
|---|---|---|
| United States | common | man's name |
| Spain | rare | man's name |
| Portugal | rare | man's name |
United States birth data
13,427 male · 0 female · 13,427 births recorded
Records from 1980–2017: 100% male.
Frequently asked questions
Is Isaias a male or female name?
Isaias is classified as a male given name in our dataset. A first name alone does not establish someone’s gender or preferred form of address.
How do I address Isaias in an email?
If you do not know Isaias’s preferred form of address, use a greeting without Mr or Ms: “Dear Isaias,” in English, “Guten Tag Isaias,” in German. Include their family name if you know it. The name’s classification describes its usage. Follow the form of address the person uses for themselves.
Is Isaias a unisex name?
Isaias is classified as generally male in the combined dataset. This does not rule out other uses. Our categories describe the sources, rather than a complete survey of everyone with this name.
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 (1880–2017), public domain. Classifications are not measured accuracy rates. Method: how we classify names. Full dataset: data & licences. US source data (babynames). Dataset built 2026-09-11; this is not a new collection date for the source records.
DearWho, "Is Isaias a male or female name?", https://www.dearwho.app/name/isaias. 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://www.dearwho.app/name/isaias},
note = {Data: nam_dict (GFDL), US SSA public domain}
}