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

Janczak, 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 Janczak surname is from the 2010 census data.

Popularity of Janczak in America

Janczak is the 33343rd most popular name in America based on the data we have collected from the U.S. Census Bureau.

The Janczak surname appeared 685 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 Janczak.

We can also compare 2010 data for Janczak 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 Janczak

The surname Janczak originates from Poland. It is a Polish variation of the name Jan, which is derived from the Hebrew name Yohanan, meaning "Yahweh is gracious." The suffix "-czak" was added to form a diminutive or patronymic version of the name.

Janczak is believed to have emerged in the late Middle Ages or Renaissance period in Poland, possibly as early as the 13th or 14th century. It was likely first used to distinguish individuals from the same family or region, as surnames became more common during this time.

While no specific historical references or manuscripts mentioning the name Janczak have been found, it is possible that the name may have appeared in old church records or local documents from various regions of Poland.

One of the earliest recorded individuals with the surname Janczak was Jan Janczak, a Polish nobleman who lived in the 16th century. Another notable figure was Władysław Janczak, a Polish politician and member of the Sejm (Polish parliament) in the early 20th century.

In the 17th century, there was a prominent Polish military leader named Michał Janczak, who played a significant role in the Polish-Swedish wars during the reign of King John II Casimir Vasa.

Another individual of note was Franciszek Janczak, a Polish educator and writer from the 18th century, who authored several books on philosophy and ethics.

Lastly, in the 19th century, there was a Polish artist named Kazimierz Janczak, known for his landscape paintings depicting the beautiful countryside of Poland.

While the Janczak surname is primarily associated with Poland, it is also found in other Slavic countries and regions with historical ties to Poland, such as parts of Lithuania, Belarus, and western Ukraine.

Race and ethnic origin of people with the last name Janczak

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

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

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

Reference this page

We spend a lot of resources downloading, cleaning, merging, and formatting the data that is shown on the site.

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!