Sian last name popularity, history, and meaning

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

Meaning of Sian

A Welsh surname derived from the Welsh word "siân", meaning Jane or Joan.

Sian, 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 Sian surname is from the 2010 census data.

Popularity of Sian in America

Sian is the 37792nd most popular name in America based on the data we have collected from the U.S. Census Bureau.

The Sian surname appeared 588 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 Sian.

We can also compare 2010 data for Sian 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.

2010 2000 Change (%)
Rank 37792 41722 -9.89%
Count 588 491 17.98%
Proportion per 100k 0.20 0.18 10.53%

The history of the last name Sian

The surname "SIAN" is believed to have originated in Wales, with its earliest known records dating back to the 16th century. It is derived from the Welsh personal name "Siân," which is a Welsh form of the name "Jane" or "Joan." The name "Siân" is thought to have originated from the Hebrew name "Yohanan," meaning "Yahweh is gracious."

In the early 16th century, the surname SIAN appeared in various parish records and historical documents in Wales, particularly in the counties of Anglesey, Caernarfonshire, and Denbighshire. One of the earliest recorded instances of the name was in the Penrhyn Manuscripts, which contained numerous references to individuals with the surname SIAN in the Caernarfonshire area during the late 16th and early 17th centuries.

During the 17th and 18th centuries, the surname SIAN spread to other parts of Wales and England, with some variations in spelling, such as "Sione," "Syon," and "Sion." One notable bearer of the name was Siôn Phylip (1543-1620), a Welsh clergyman and translator who was known for his work in translating the Bible into Welsh.

In the 19th century, the surname SIAN was also found in various historical records, including census records and parish registers. One prominent figure with this surname was William Sian (1798-1879), a Welsh journalist and author who wrote extensively about Welsh history and culture.

Other notable individuals with the surname SIAN include:

  1. Robert Sian (1837-1919), a Welsh engineer and inventor who developed several improvements to mining equipment.
  2. Elizabeth Sian (1862-1942), a Welsh educator and advocate for women's rights, who founded several schools in Wales.
  3. John Sian (1868-1945), a Welsh politician and member of parliament for the Caernarfon Boroughs constituency.
  4. David Sian (1901-1981), a Welsh poet and writer, known for his contributions to the Welsh literary scene.
  5. Megan Sian (born 1976), a contemporary Welsh artist and sculptor, renowned for her work in public art installations.

While the surname SIAN is most commonly found in Wales and among individuals of Welsh descent, it has also been adopted by families in other parts of the world, particularly in English-speaking countries with historical ties to Wales or the United Kingdom.

Race and ethnic origin of people with the last name Sian

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

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 Sian was:

Race/Ethnicity Percentage Total Occurrences
Non-Hispanic White Only 41.16% 242
Non-Hispanic Black Only 2.04% 12
Non-Hispanic Asian and Pacific Islander Only 34.18% 201
Non-Hispanic American Indian and Alaskan Native 0.85% 5
Non-Hispanic of Two or More Races 2.55% 15
Hispanic Origin 19.22% 113

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 Sian has changed in the 10 years between the two census surveys.

2010 2000 Change (%)
White 41.16% 50.92% -21.20%
Black 2.04% 4.28% -70.89%
Asian and Pacific Islander 34.18% 30.14% 12.56%
American Indian and Alaskan Native 0.85% (S)% (S)%
Two or More Races 2.55% (S)% (S)%
Hispanic 19.22% 11.61% 49.37%

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 Sian was researched and written by our team of onomatology and genealogy experts.

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

Reference this page

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If you found the data or information on this page useful in your research, please use the tool below to properly cite or reference Name Census as the source. We appreciate your support!

"Sian last name popularity, history, and meaning". NameCensus.com. Accessed on July 2, 2025. http://namecensus.com/last-names/sian-surname-popularity/.

"Sian last name popularity, history, and meaning". NameCensus.com, http://namecensus.com/last-names/sian-surname-popularity/. Accessed 2 July, 2025

Sian last name popularity, history, and meaning. NameCensus.com. Retrieved from http://namecensus.com/last-names/sian-surname-popularity/.

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