Cleo

Cleo is classified as a mostly female given name in our dataset. A first name alone does not establish someone’s gender or preferred form of address.

Mostly femaleHigh

Confidence describes the weight of the source data, not a measured accuracy rate.

Cleo · Cléo

Verdict: Mostly female
Confidence: High (source weight of at least 64; not an accuracy rate)
High source frequency in: United States, Belgium, France
Also spelled: Cléo
US records 1880–2017: 11,369 male / 30,459 female
Data: nam_dict (GFDL) + US SSA
Dataset built: 2026-09-11

How to address Cleo

If you do not know Cleo’s preferred form of address, use a greeting without Mr or Ms: “Dear Cleo,” in English, “Guten Tag Cleo,” 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 Cleo,

German

Guten Tag Cleo,

French

Bonjour Cleo,

Spanish

Estimado/a Cleo:

Chinese

Cleo您好：

Japanese

Cleo様

English

Hi Cleo,

German

Hi Cleo,

French

Salut Cleo,

Spanish

Hola Cleo,

Chinese

Cleo你好：

Japanese

Cleo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

Classification of Cleo by country (nam_dict and US SSA; not a survey of today’s population)
Country	How common	Usually
United States	very common	woman's name
Belgium	rare	woman's name
France	rare	woman's name
Great Britain	rare	woman's name
Italy	rare	woman's name
Netherlands	rare	woman's name

United States birth data

11,369 male · 30,459 female · 41,828 births recorded

Male ≈ 27.2%Female ≈ 72.8%

Records from 1980–2017: 20.7% male.

Frequently asked questions

Is Cleo a male or female name?

Cleo is classified as a mostly female given name in our dataset. A first name alone does not establish someone’s gender or preferred form of address.

How do I address Cleo in an email?

Is Cleo a unisex name?

Cleo is classified as generally female 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.

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.

Cite this page

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

BibTeX

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