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

Iwamura, 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 Iwamura surname is from the 2010 census data.

Popularity of Iwamura in America

Iwamura is the 116201st most popular name in America based on the data we have collected from the U.S. Census Bureau.

The Iwamura surname appeared 150 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 Iwamura.

We can also compare 2010 data for Iwamura 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 Iwamura

The surname Iwamura has its origins in Japan. It is believed to have emerged during the Heian period, which spanned from 794 to 1185 CE. The name is derived from the Japanese words "iwa," meaning rock or stone, and "mura," signifying village or settlement. Therefore, Iwamura can be interpreted as "rock village" or "stone settlement."

One of the earliest known references to the Iwamura name can be found in the Shoku Nihongi, an imperial chronicle completed in 797 CE. This historical text mentions an individual named Iwamura no Chikanari, who served as a provincial governor during the late 8th century.

In the Kamakura period, which lasted from 1185 to 1333 CE, the Iwamura family held significant influence in the region of Echigo (present-day Niigata Prefecture). Historical records document an Iwamura Nobutaka, a samurai warrior who fought alongside the Hojo clan during the Genpei War in the late 12th century.

During the Muromachi period (1336-1573 CE), the Iwamura clan was prominent in the Kanto region. Iwamura Sadayoshi, born in 1472, was a renowned daimyo (feudal lord) who ruled over the Iwamura Domain in what is now Gunma Prefecture.

In the Edo period (1603-1868 CE), the Iwamura family remained influential in various regions of Japan. Iwamura Michitake, born in 1632, was a prominent scholar and poet who served as a retainer to the Tokugawa shogunate.

Another notable figure bearing the Iwamura surname was Iwamura Tsutomu, a celebrated mathematician and educator who lived from 1805 to 1887. He made significant contributions to the development of modern mathematics education in Japan.

It is worth noting that the Iwamura name has also been associated with various place names throughout Japan's history. For instance, the Iwamura District in Niigata Prefecture and the Iwamura Castle in Gunma Prefecture were named after the prominent Iwamura clans that once ruled over those regions.

Race and ethnic origin of people with the last name Iwamura

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

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

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

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