2000
#131,366
National surname rank
Recorded bearers 119
First available Census row
Per 100,000 0.04
Very Rare Last name
Hydo
An English surname possibly derived from a nickname meaning "wild" or "hasty".
According to the 2020 US Census Bureau surname tables, roughly 128 Americans carry the last name Hydo. That puts it at #147,954 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,677,768 residents).
This page is the full Name Census profile for the Hydo 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
128
1 in 2,677,768
Census rank
#147,954
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
112
very rare in the US
Popularity narrative
The Census Bureau recorded 112 bearers of the surname Hydo in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 147954th position in the national surname ranking.
Among Census respondents with the surname Hydo, the largest self-reported group is White at 84.8%. The next largest groups are Hispanic (9.8%) and Two or More Races (5.4%).
Origin
Meaning and origin of Hydo
The surname "HYDO" is believed to have originated in central Europe, specifically in the region that is now modern-day Austria and southern Germany. Its roots can be traced back to the late medieval period, around the 13th or 14th century.
One theory suggests that the name "HYDO" may have derived from an old Germanic word meaning "hidden" or "secluded," possibly referring to a person who lived in a remote or concealed location. It could also be related to the Old High German word "hutten," which means "hut" or "small dwelling."
Another possibility is that "HYDO" was initially a toponymic surname, originating from a specific place or geographical feature. Some historians have proposed that it may have been derived from the name of a small village or hamlet, although the precise location remains uncertain.
Early records of the surname "HYDO" are scarce, but it is believed to have appeared in various medieval documents and records from the region. One notable mention is in a 15th-century land registry from the town of Salzburg, where a certain Hans HYDO was listed as a landowner.
In the 16th century, a prominent figure bearing the surname "HYDO" was Johannes HYDO, a scholar and theologian born in the town of Innsbruck in 1523. He authored several works on religious philosophy and served as a professor at the University of Vienna.
During the 17th century, the name "HYDO" gained recognition through the exploits of Christoph HYDO, a renowned military commander who fought in the Thirty Years' War. Born in 1594 in the city of Graz, he served under the Holy Roman Empire and was known for his strategic prowess on the battlefield.
In the 18th century, a notable figure with the surname "HYDO" was Maria HYDO, a prominent artist and painter from the city of Vienna. Born in 1712, her works were highly acclaimed during her lifetime and can still be found in several art galleries throughout Europe.
Another individual of note was Karl HYDO, a respected architect and urban planner who lived in the late 18th and early 19th centuries. Born in 1775 in the town of Linz, he was responsible for designing several notable buildings and public spaces in various cities across Austria and southern Germany.
Throughout its history, the surname "HYDO" has been borne by many individuals from various walks of life, including scholars, artists, military leaders, and professionals. While its precise origins may remain somewhat shrouded in mystery, the name has left an indelible mark on the cultural and historical tapestry of central Europe.
Demographics
Ancestry and ethnicity for Hydo
Among Census respondents with the surname Hydo, the largest self-reported group is White at 84.8%. The next largest groups are Hispanic (9.8%) and Two or More Races (5.4%).
The bar chart below shows how Hydo 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 Hydo surname at the time of the 2020 Census, not any inherent property of the name itself.
- White84.8% · 95
- Hispanic or Latino9.8% · 11
- Two or more races5.4% · 6
Timeline
Historical Census data for Hydo
Hydo 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
#144,141
National surname rank
Recorded bearers 115
-4 bearers (-3.4%)
Per 100,000 0.04
Rank movement Down 12,775 places
2020
#147,954
National surname rank
Recorded bearers 112
-3 bearers (-2.6%)
Per 100,000 0.04
Rank movement Down 3,813 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #131,366 | 119 | 0.04 | First available Census row | First available Census row |
| 2010 | #144,141 | 115 | 0.04 | -4 bearers (-3.4%) | Down 12,775 places |
| 2020 | #147,954 | 112 | 0.04 | -3 bearers (-2.6%) | Down 3,813 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 Hydo 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 | #144,141 | #147,954 | -2.6% |
| Count | 115 | 112 | -2.6% |
| Per 100K | 0.04 | 0.04 | -6.3% |
Between the 2010 and 2020 Census, the number of Hydo bearers went from 115 to 112 (-2.6% change). The surname moved down 3,813 positions in the national ranking, going from #144,141 to #147,954.
FAQ
Hydo surname: questions and answers
How many people in the U.S. have the surname Hydo?
Name Census estimates that about 128 living Americans carry the surname Hydo. Using the current population baseline, that works out to roughly 1 in 2,677,768 residents.
How common is Hydo?
Hydo ranks #147,954 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 112 people with the surname Hydo. That is different from the site's living-bearer estimate (128), 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 Hydo.
Has Hydo become more or less common over time?
Between 2010 and 2020, the surname Hydo went from 115 recorded bearers to 112. That is a decrease of 3 (-2.6%). In the national ranking it fell from #144,141 to #147,954.
What does the Census say about the background of Hydo?
Among Census respondents with the surname Hydo, the largest self-reported group is White at 84.8%. The next largest groups are Hispanic (9.8%) and Two or More Races (5.4%). 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 Hydo in the 2020 Census, accounting for 84.8% (95 people in the source table).
What is the full ancestry breakdown?
Hydo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are White (84.8%), Hispanic (9.8%), Two or More Races (5.4%). 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 Hydo (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 Hydo mean?
An English surname possibly derived from a nickname meaning "wild" or "hasty". 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 Hydo (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 share the surname Hydo?
For a faster, more casual read, check HowManyOfMe.org — our sister site built around that single question.