2010
#152,628
National surname rank
Recorded bearers 107
First available Census row
Per 100,000 0.04
Very Rare Last name
Ydrogo
A surname of Spanish origin, potentially derived from a location or topographic feature.
According to the 2020 US Census Bureau surname tables, roughly 131 Americans carry the last name Ydrogo. That puts it at #146,495 in the national surname ranking, appearing at a frequency of 0.04 per 100,000 people (about 1 in 2,616,445 residents).
This page is the full Name Census profile for the Ydrogo 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
131
1 in 2,616,445
Census rank
#146,495
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
114
very rare in the US
Popularity narrative
The Census Bureau recorded 114 bearers of the surname Ydrogo in its 2020 decennial surname file. At a rate of 0.04 per 100,000 residents, it holds the 146495th position in the national surname ranking.
Among Census respondents with the surname Ydrogo, the largest self-reported group is Hispanic at 75.4%. The next largest groups are White (19.3%) and Asian/Pacific Islander (1.8%).
Origin
Meaning and origin of Ydrogo
The surname Ydrogo originates from the Iberian Peninsula, specifically from Spain. The exact inception of this surname can be traced back to the early medieval period, around the 10th or 11th century. The regions of Navarra and Castilla are particularly noted for their association with the surname. The name Ydrogo likely derives from a combination of old Spanish or Basque elements, which may be related to topographical or occupational names prevalent at that time.
Historical records indicate that the name Ydrogo appeared in various medieval manuscripts and legal documents. For example, a 13th-century ledger from the Kingdom of Castile mentions a certain Don Martín Ydrogo, who played a significant role in regional governance. This early reference suggests that the name was already established and associated with positions of influence.
The name's linguistic roots may be linked to the old Spanish word "hidro," which means water, combined with "go," a common suffix in ancient Basque names implying "place of." This etymological combination suggests that it could refer to someone living near a water source or working in an occupation related to water.
Among the earliest recorded examples of the surname, Pedro Ydrogo was listed in land grants from the late 12th century. Such records helped in tracing the distribution and status of the Ydrogo family over centuries. Another significant figure is Isabel Ydrogo, who is mentioned in 15th-century court records in Toledo. She was a notable landowner and a patron of the local church.
Famous personalities with the surname include Juan de Ydrogo, born in 1495, who was an explorer and trader significant in the early transatlantic voyages connecting Spain with the New World. Juan de Ydrogo's journals and correspondences provide valuable insights into the early colonial period.
Another historically important individual is Francisco Ydrogo, a military commander who fought in the 1640 Catalonian Revolt. His leadership and tactical acumen are documented in various military archives and have been subjects of historical studies on Spanish military history.
Clara Ydrogo, born in 1678, is another noteworthy figure. She was an accomplished poet and philosopher whose works contributed to the Spanish Baroque literary movement. Clara's correspondence with other intellectuals of her time underscores the cultural interplay within Spain's literary circles.
Throughout the centuries, the surname Ydrogo appears in various forms: Hydrago, Idrogo, and Ydarrogo, reflecting regional dialects and the evolution of the language. Such variations are commonly found in historical records like tax documents, birth registries, and marriage certificates, each revealing the societal influences on the Ydrogo family and their migrations.
The Ydrogo name continues to be of interest to genealogists and historians, offering a rich tapestry of connections to Spanish, Basque, and broader European heritage.
Demographics
Ancestry and ethnicity for Ydrogo
Among Census respondents with the surname Ydrogo, the largest self-reported group is Hispanic at 75.4%. The next largest groups are White (19.3%) and Asian/Pacific Islander (1.8%).
The bar chart below shows how Ydrogo 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 Ydrogo surname at the time of the 2020 Census, not any inherent property of the name itself.
- Hispanic or Latino75.4% · 86
- White19.3% · 22
- Asian and Pacific Islander1.8% · 2
- American Indian and Alaska Native1.8% · 2
- Two or more races1.8% · 2
Timeline
Historical Census data for Ydrogo
Ydrogo appears in 2 published Census surname files: 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2020
#146,495
National surname rank
Recorded bearers 114
+7 bearers (+6.5%)
Per 100,000 0.04
Rank movement Up 6,133 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2010 | #152,628 | 107 | 0.04 | First available Census row | First available Census row |
| 2020 | #146,495 | 114 | 0.04 | +7 bearers (+6.5%) | Up 6,133 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 Ydrogo 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 | #152,628 | #146,495 | 4.0% |
| Count | 107 | 114 | 6.5% |
| Per 100K | 0.04 | 0.04 | -4.6% |
Between the 2010 and 2020 Census, the number of Ydrogo bearers went from 107 to 114 (+6.5% change). The surname moved up 6,133 positions in the national ranking, going from #152,628 to #146,495.
FAQ
Ydrogo surname: questions and answers
How many people in the U.S. have the surname Ydrogo?
Name Census estimates that about 131 living Americans carry the surname Ydrogo. Using the current population baseline, that works out to roughly 1 in 2,616,445 residents.
How common is Ydrogo?
Ydrogo ranks #146,495 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 114 people with the surname Ydrogo. That is different from the site's living-bearer estimate (131), 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 Ydrogo.
Has Ydrogo become more or less common over time?
Between 2010 and 2020, the surname Ydrogo went from 107 recorded bearers to 114. That is an increase of 7 (+6.5%). In the national ranking it rose from #152,628 to #146,495.
What does the Census say about the background of Ydrogo?
Among Census respondents with the surname Ydrogo, the largest self-reported group is Hispanic at 75.4%. The next largest groups are White (19.3%) and Asian/Pacific Islander (1.8%). 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?
Hispanic is the largest self-reported group for the surname Ydrogo in the 2020 Census, accounting for 75.4% (86 people in the source table).
What is the full ancestry breakdown?
Ydrogo appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Hispanic (75.4%), White (19.3%), Asian/Pacific Islander (1.8%). 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 Ydrogo (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 Ydrogo mean?
A surname of Spanish origin, potentially derived from a location or topographic feature. 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 Ydrogo (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 have the surname Ydrogo?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.