Cayo
surname · Spanish · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Cayo is a surname, with more bearers in Brazil than in any other country. It appears chiefly in Spanish and English, written in the Latin script. Recorded meaning: A small island or ledge of rock in the water; a key.
- BRBrazil1 in 739◐
- BOBolivia1 in 1.9K
- PEPeru1 in 6.7K
carrying the name, one hue, darker where it is more common. Hover a country for its figure.
- ≈289K ●
- #809 ●
- 2 ●
- Sources
- 230 ●
- 1 in 739 ◐
across 6 countries
of 16M given names
recorded for this name
206K records
Official registry-verified
Brazil
Spellings & scripts●
Locally spelled Caio in BR Brazil, US United States, GB United Kingdom and 7 more, Caius in FI Finland, CA Canada, AU Australia and 1 more, Gaius in NG Nigeria, SG Singapore, BE Belgium and Cajus in DE Germany.
Spellings marked ● are how people bearing the name write it in our records; ○ marks a model's transliteration. Click a spelling to open its page.
Meaning & origin●
A small island or ledge of rock in the water; a key.
Sources 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested across 3 languages in the etymology graph.
Where in the world●
Sorted by bearers counted by national registers, records where none counts.
| Country | Most common spelling | Sources | |||||
|---|---|---|---|---|---|---|---|
| BR Brazil | #154 | 286,597△ | 116K rec. | 1 in 739 | 287K | Caio | 230 |
| AR Argentina | — | 40,822 | 27K rec. | — | 7K | Cayo | 53 |
| PE Peru | — | 36,060 | 43K rec. | — | — | Cayo | 65 |
| CL Chile | — | 4,350 | 592 rec. | — | 1 | Cayo | 50 |
| BO Bolivia | — | 3,280 | 2.4K rec. | — | — | Cayo | 29 |
| EC Ecuador | — | 1,680 | 54 rec. | — | 32 | Cayo | 20 |
| US United States | — | 1,299 | 7.2K rec. | 1 in 256K | 1.3K | Caio | 194 |
| NG Nigeria | — | 1,168 | 2.1K rec. | — | — | Gaius | 44 |
| MX Mexico | — | 1,080 | 1.2K rec. | — | — | Cayo | 33 |
| GB United Kingdom | — | 728 | 495 rec. | — | 3 | Caio | 58 |
| PT Portugal | #739 | 712 | 237 rec. | — | listed | Caio | 69 |
| CA Canada | — | 615 | 192 rec. | — | 5 | Caius | 36 |
Roughly 287K people in Brazil bear this name (about 1 in 739). Estimates project the name's share of our records onto national population, so each is only as good as the record base beside it — the Basis column gives that base; rows marked △ rest on fewer records than the estimate itself and are order-of-magnitude at best.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table. How that works.
Languages●
- Spanish88K88%
- English6.2K6%
- Portuguese1K1%
- 7921%
- Hindi7351%
Show as table
| Name | Records | Note |
|---|---|---|
| Spanish | 88,382 | 88% |
| English | 6,231 | 6% |
| Portuguese | 1,034 | 1% |
| 792 | 1% | |
| Hindi | 735 | 1% |
Language is read off each record's context, not declared by the bearer; a share is of all records for this spelling.
Other recorded senses●
Cayo is also recorded in 5 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Spanish, key (island)
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In Spanish, Latín Gaius, probablemente 'grajo' o nombre totémico
as a nameDiccionario etimológico de nombres propios
In English, district, Belize
as a namePronouncing Dictionary of Proper Names
From the Latin personal name Caius.
as a nameA concise dictionary of first names
Spanish: from the classical Latin personal name Caius , Gaius , which is of extremely ancient origin and uncertain etymology. It was borne, for example, by the dictator Caius Julius Caesar, and in the early Christian period by numerous saints.
as a word
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Over time●
Show as table
| Year | records |
|---|---|
| 1903 | 1 |
| 1906 | 2 |
| 1909 | 2 |
| 1912 | 1 |
| 1913 | 1 |
| 1914 | 2 |
| 1915 | 3 |
| 1916 | 2 |
| 1917 | 2 |
| 1918 | 4 |
| 1919 | 1 |
| 1920 | 1 |
| 1921 | 1 |
| 1922 | 5 |
| 1923 | 3 |
| 1924 | 4 |
| 1925 | 2 |
| 1927 | 1 |
| 1928 | 4 |
| 1929 | 2 |
| 1930 | 8 |
| 1931 | 6 |
| 1932 | 5 |
| 1933 | 10 |
| 1934 | 5 |
| 1935 | 7 |
| 1936 | 4 |
| 1937 | 5 |
| 1938 | 6 |
| 1939 | 10 |
| 1940 | 8 |
| 1941 | 10 |
| 1942 | 5 |
| 1943 | 8 |
| 1944 | 10 |
| 1945 | 10 |
| 1946 | 9 |
| 1947 | 15 |
| 1948 | 5 |
| 1949 | 9 |
| 1950 | 7 |
| 1951 | 5 |
| 1952 | 14 |
| 1953 | 6 |
| 1954 | 12 |
| 1955 | 8 |
| 1956 | 9 |
| 1957 | 11 |
| 1958 | 11 |
| 1959 | 13 |
| 1960 | 12 |
| 1961 | 18 |
| 1962 | 10 |
| 1963 | 16 |
| 1964 | 11 |
| 1965 | 16 |
| 1966 | 15 |
| 1967 | 11 |
| 1968 | 18 |
| 1969 | 18 |
| 1970 | 13 |
| 1971 | 26 |
| 1972 | 18 |
| 1973 | 18 |
| 1974 | 20 |
| 1975 | 31 |
| 1976 | 17 |
| 1977 | 25 |
| 1978 | 19 |
| 1979 | 16 |
| 1980 | 34 |
| 1981 | 25 |
| 1982 | 33 |
| 1983 | 28 |
| 1984 | 24 |
| 1985 | 30 |
| 1986 | 32 |
| 1987 | 23 |
| 1988 | 27 |
| 1989 | 32 |
| 1990 | 28 |
| 1991 | 24 |
| 1992 | 28 |
| 1993 | 34 |
| 1994 | 34 |
| 1995 | 34 |
| 1996 | 32 |
| 1997 | 38 |
| 1998 | 38 |
| 1999 | 41 |
| 2000 | 29 |
| 2001 | 30 |
| 2002 | 42 |
| 2003 | 49 |
| 2004 | 33 |
| 2005 | 43 |
| 2006 | 31 |
| 2007 | 44 |
| 2008 | 42 |
| 2009 | 52 |
| 2010 | 42 |
| 2011 | 49 |
| 2012 | 30 |
| 2013 | 52 |
| 2014 | 31 |
| 2015 | 50 |
| 2016 | 42 |
| 2017 | 31 |
| 2018 | 40 |
| 2019 | 32 |
| 2020 | 28 |
| 2021 | 36 |
| 2022 | 29 |
| 2023 | 35 |
| 2024 | 32 |
EC INEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024) — 115 years between 1903–2024. One register's own figures, never a sum across registers: two registers counting the same people would double them.
Notable people with this name●
- Percy Cayob. 1937PEPeruvian historian
- Elsa Cayob. 1951PEPeruvian-born artist and filmmaker (born 1951)
- Alberto Durantb. 1951PEnot in their usual namePeruvian film director
- Daniel Córdova Cayob. 1965PEPeruvian economist
- Amiel Cayo Coaquirab. 1969PEPeruvian actor and visual artist
- Bárbara Cayob. 1974PEPeruvian actress, singer, presenter, producer, and composer
- Fiorella Cayob. 1975PEPeruvian actress
- Stephanie Cayob. 1988PEPeruvian actress and singer
- Nathan Cayob. 1997CACanadian basketball player (born 1997)
- Alessia Rovegnob. 1998PEnot in their usual namePeruvian model and singer (1998-)
The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).
Evidence●
Attested in 35 sources across 19 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| AR Argentina | RENAPER — Apellidos (person counts, national) | — | 7K | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2022 | 2.7K | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 2.7K | #4,128 |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2020 | 2.6K | — |
| EC Ecuador | INEC — Visualizador de Nombres y Apellidos, per-token query API (1900–2024) | — | 2.2K | — |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2010 | 1.8K | — |
| BR Brazil | IBGE — Nomes (census name API) | — | 1.4K | #7,518 |
| BR Brazil | Brasil.IO genero-nomes (IBGE Censo 2010 mirror, CC-BY-SA) | — | 1.4K | #3,039 |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | 2000 | 1K | — |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 807 | #30,865 |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2000 | 805 | — |
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 785 | #29,918 |
Reference works 2
- Wikipedia given-name tokens
- Wikidata name items (native-script + romanized given/family names)
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-09-12 data build · 316 rows in the corpus for this spelling.
Frequently asked questions
- How common is the name Cayo?
- We estimate roughly 289 thousand people bear Cayo (counting its spellings and scripts) across 6 countries in our records.
- In which country does Cayo have the most bearers?
- We estimate about 287 thousand people bear Cayo in Brazil, more than in any other country in our records, where it is most often spelled caio.
- Where is Cayo most common?
- Cayo is densest in Brazil, where the national register counts about 1 in 739 people carrying it.
- How common is Cayo compared with other names?
- In Brazil, Cayo is the 154th most common given name of 536,280 given names recorded there.
- What does the name Cayo mean?
- Recorded meaning: A small island or ledge of rock in the water; a key.
Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/cayoThe same payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. Rate-limited for casual use. Bulk access and licensing.
About this data
Data snapshot . Figures are rebuilt periodically and will change.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “Cayo” — the 154th most common given name in Brazil. Data snapshot 2026-09-12.