Find out how popular the last name Janeiro is in the United States and learn more about the meaning, history, and race and ethnic origin of people in America who are named Janeiro.

Janeiro, like all of the last names we have data for, is identified by the U.S. Census Bureau as a surname which has more than 100 occurrences in the United States in the Decennial Census survey. The most recent statistics we have for the Janeiro surname is from the 2010 census data.

Popularity of Janeiro in America

Janeiro is the 55962nd most popular name in America based on the data we have collected from the U.S. Census Bureau.

The Janeiro surname appeared 366 times in the 2010 census and if you were to sample 100,000 people in the United States, approximately 0 people would have the surname Janeiro.

We can also compare 2010 data for Janeiro to data from the previous census in 2000. The table below contains all of the statistics for both years in a side-by-side comparison.

The history of the last name Janeiro

The surname JANEIRO is of Portuguese origin, with its roots dating back to the 15th century. It is derived from the Portuguese word "janeiro," which means "January." The name is believed to have originated in the region of Lisbon, where it was likely used as a descriptive name for someone born in the month of January.

One of the earliest recorded instances of the JANEIRO surname can be found in the archives of the Monastery of Santa Maria de Alcobaça, a medieval Cistercian monastery located in central Portugal. The records mention a certain João JANEIRO, a landowner who donated a portion of his property to the monastery in the year 1459.

The surname JANEIRO also appears in the "Livro da Nobreza" (Book of Nobility), a Portuguese genealogical work from the 16th century, which chronicles the lineages of noble families. It mentions a prominent family with the surname JANEIRO, who traced their ancestry back to the city of Porto.

In the 17th century, the JANEIRO surname gained further recognition with the rise of Manuel JANEIRO (1620-1688), a celebrated Portuguese playwright and poet. His works, such as "A Critica" and "O Medico a Força," were highly influential in the development of Portuguese theater during the Baroque period.

Another notable figure was Pedro JANEIRO (1714-1789), a Portuguese architect and military engineer who played a crucial role in the reconstruction of Lisbon following the devastating earthquake of 1755. He was responsible for designing several important buildings, including the Ribeira Palace and the Church of São Julião.

The JANEIRO surname also found its way to the New World, as evidenced by the records of the Portuguese colonization of Brazil. In the late 18th century, a wealthy landowner named Joaquim JANEIRO (1745-1821) established a successful sugar plantation in the state of Pernambuco, contributing to the region's economic development.

During the 19th century, the JANEIRO surname gained prominence in the field of medicine with the renowned physician and researcher Antônio JANEIRO (1824-1897). He made significant contributions to the study of tropical diseases, particularly yellow fever, and his work helped shape public health policies in Brazil.

As the Portuguese Empire expanded, the JANEIRO surname spread to other parts of the world, including Africa and Asia. In the early 20th century, a notable figure was José JANEIRO (1902-1978), a prominent lawyer and political activist who played a key role in the independence movement of Portuguese Timor (now Timor-Leste).

Race and ethnic origin of people with the last name Janeiro

We also have some data on the ancestry of people with the surname Janeiro.

The below race categories are the modified race categories used in the Census Bureau's population estimates program. All people were categorized into six mutually exclusive racial and Hispanic origin groups:

1. White only
2. Black only
3. American Indian and Alaskan Native only
4. Asian and Pacific Islander only
5. Hispanic
6. Two or More Races

For the most recent 2010 census data, the race/ethnic origin breakdown for Janeiro was:

Note: Any fields showing (S) means the data was suppressed for privacy so that the data does not in any way identify any specific individuals.

Since we have data from the previous census in 2000, we can also compare the values to see how the popularity of Janeiro has changed in the 10 years between the two census surveys.

Data source

The last name data and ethnic breakdown of last names is sourced directly from the Decennial Census survey, conducted every 10 years by the United States Census Bureau.

The history and meaning of the name Janeiro was researched and written by our team of onomatology and genealogy experts.

If you have a correction or suggestion to improve the history of Janeiro, please contact us.

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