2000
#113,519
National surname rank
Recorded bearers 143
First available Census row
Per 100,000 0.05
Very Rare Last name
Jadach
A Polish surname derived from the personal name Jadach, a diminutive form of Jadwiga.
According to the 2020 US Census Bureau surname tables, roughly 138 Americans carry the last name Jadach. That puts it at #142,049 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,483,727 residents).
This page is the full Name Census profile for the Jadach surname. You will find the Census Bureau frequency data, a multi-census history view, an ancestry and ethnicity breakdown based on self-reported demographics, the name's meaning and origin where available, and answers to the most common questions people ask about this surname.
Bearers in the US
138
1 in 2,483,727
Census rank
#142,049
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
120
very rare in the US
Popularity narrative
The Census Bureau recorded 120 bearers of the surname Jadach in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 142049th position in the national surname ranking.
Among Census respondents with the surname Jadach, the largest self-reported group is White at 96.7%. The next largest groups are Hispanic (2.5%) and Asian/Pacific Islander (0.8%).
Origin
Meaning and origin of Jadach
The surname Jadach is believed to have originated in Poland, where it first appeared in the historical records during the 16th century. The name is derived from the Polish word "jad," which means "venom" or "poison," suggesting that the name may have been given to someone who worked with or dealt in poisonous substances, such as an apothecary or a herbalist.
One of the earliest recorded instances of the name Jadach can be found in the parish records of the village of Grodków, located in the Opole Voivodeship of southwestern Poland. In 1586, a man named Jan Jadach was listed as a resident of the village, and his name appeared in several subsequent records over the following decades.
Another early reference to the name Jadach can be found in the records of the town of Kraków, where a merchant named Mikołaj Jadach was mentioned in a document dated 1612. This suggests that the name was not confined to any particular region of Poland, but was present in both rural and urban areas.
In the 18th century, the name Jadach appears in the records of the town of Legnica, in the Lower Silesian region of Poland. A man named Jakub Jadach was born in Legnica in 1723 and worked as a blacksmith, carrying on the family trade for several generations.
One of the most notable individuals with the surname Jadach was Franciszek Jadach, a Polish writer and poet who lived from 1786 to 1853. He was born in the village of Dobromil, which was then part of the Austrian Empire, and his works were widely read and acclaimed during his lifetime.
Another prominent figure with the surname Jadach was Józef Jadach, a Polish military officer who fought in the November Uprising against the Russian Empire in 1830-1831. He was born in 1802 in the town of Tarnów and rose to the rank of colonel during the uprising, earning several military honors for his service.
In the late 19th century, the name Jadach can be found in the records of the town of Brzesko, located in the Małopolska region of southern Poland. A family of farmers named Jadach lived in the village of Jasień, near Brzesko, and their descendants continued to work the land for several generations.
While the surname Jadach is not among the most common in Poland, it has a long and storied history dating back to the 16th century, with roots that can be traced to various regions of the country. The name has been borne by writers, military officers, merchants, and farmers, among others, and continues to be a part of Poland's rich cultural heritage.
Demographics
Ancestry and ethnicity for Jadach
Among Census respondents with the surname Jadach, the largest self-reported group is White at 96.7%. The next largest groups are Hispanic (2.5%) and Asian/Pacific Islander (0.8%).
The bar chart below shows how Jadach bearers described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given surname, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown for every Census year so the breakdown stays comparable over time. When the source file also includes raw headcounts, Name Census shows those alongside the percentages in the legend.
Keep in mind that these are self-reported numbers. A person's surname does not determine their race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the Jadach surname at the time of the 2020 Census, not any inherent property of the name itself.
- White96.7% · 116
- Hispanic or Latino2.5% · 3
- Asian and Pacific Islander0.8% · 1
Timeline
Historical Census data for Jadach
Jadach appears in 3 published Census surname files: 2000, 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2010
#136,449
National surname rank
Recorded bearers 123
-20 bearers (-14.0%)
Per 100,000 0.04
Rank movement Down 22,930 places
2020
#142,049
National surname rank
Recorded bearers 120
-3 bearers (-2.4%)
Per 100,000 0.04
Rank movement Down 5,600 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #113,519 | 143 | 0.05 | First available Census row | First available Census row |
| 2010 | #136,449 | 123 | 0.04 | -20 bearers (-14.0%) | Down 22,930 places |
| 2020 | #142,049 | 120 | 0.04 | -3 bearers (-2.4%) | Down 5,600 places |
For 2020, the Census Bureau published race and Hispanic-origin columns as counts rather than percentages. Name Census converts those counts back into shares so the ancestry section stays comparable with the older surname files.
Year on year
2010 vs 2020 Census
How has the Jadach surname changed between Census years? The chart shows bearer count side by side, and the table compares rank, count, and frequency.
Census year comparison
20102020
| Metric | 2010 | 2020 | Change |
|---|---|---|---|
| Rank | #136,449 | #142,049 | -4.1% |
| Count | 123 | 120 | -2.4% |
| Per 100K | 0.04 | 0.04 | 0.4% |
Between the 2010 and 2020 Census, the number of Jadach bearers went from 123 to 120 (-2.4% change). The surname moved down 5,600 positions in the national ranking, going from #136,449 to #142,049.
FAQ
Jadach surname: questions and answers
How many people in the U.S. have the surname Jadach?
Name Census estimates that about 138 living Americans carry the surname Jadach. Using the current population baseline, that works out to roughly 1 in 2,483,727 residents.
How common is Jadach?
Jadach ranks #142,049 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.04 per 100,000 residents, which is about 0 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 120 people with the surname Jadach. That is different from the site's living-bearer estimate (138), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.04 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.04 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 0 of them to have the surname Jadach.
Has Jadach become more or less common over time?
Between 2010 and 2020, the surname Jadach went from 123 recorded bearers to 120. That is a decrease of 3 (-2.4%). In the national ranking it fell from #136,449 to #142,049.
What does the Census say about the background of Jadach?
Among Census respondents with the surname Jadach, the largest self-reported group is White at 96.7%. The next largest groups are Hispanic (2.5%) and Asian/Pacific Islander (0.8%). These figures come from the 2020 Census Bureau surname tables, based on how respondents described their own race and ethnicity.
Which group reports this surname most often?
White is the largest self-reported group for the surname Jadach in the 2020 Census, accounting for 96.7% (116 people in the source table).
What is the full ancestry breakdown?
Jadach appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (96.7%), Hispanic (2.5%), Asian/Pacific Islander (0.8%). For 2020, the source file also published raw headcounts for each group, which is why this page can show both percentages and counts in the ancestry section.
Is this page using the latest Census data?
Yes. This page is using the latest surname file currently loaded on Name Census, which is 2020. The historical section above also keeps any older Census surname entries we have for Jadach (2000, 2010, 2020).
Does the Census include every surname?
No. The Census Bureau only publishes surnames that appeared at least 100 times in a given decennial Census. That means very rare surnames are excluded entirely, and a surname can appear in one Census release but disappear from a later one if it falls below the reporting threshold.
Why don't the ancestry percentages always add up to exactly 100%?
There are two main reasons: rounding and suppression. The Census Bureau rounds published values, and it may suppress very small cells to protect privacy. For 2020, the Bureau also published raw group counts rather than direct percentages, so Name Census converts those counts back into shares for comparability across census years.
What does Jadach mean?
A Polish surname derived from the personal name Jadach, a diminutive form of Jadwiga. The fuller origin note on this page goes into more detail.
Where does the surname data come from?
All surname statistics on Name Census are drawn from the US Census Bureau's decennial surname frequency tables. These files list every surname that appeared 100 or more times in the 2020 Census, along with a count, a per-100,000 rate, and a self-reported demographic breakdown. You can read the full explanation on our methodology page.
How does Name Census estimate living bearers?
For surnames, Name Census does not age cohorts the way it does for first names. Instead, it takes the Census Bureau's published frequency for Jadach (0.04 per 100,000) and applies that rate to the current U.S. resident population to estimate how many living Americans have the surname today.
How many people are called Jadach?
See how many people are called Jadach on HowManyOfMe.org, our sister site built around that single question.