Achaius
A Greek masculine name relating to the historical region of Achaea.
Name Census estimates that about 5 living Americans carry the first name Achaius. The name is used almost exclusively for boys. The average person named Achaius today is around 11 years old, and the year with the single highest number of Achaius births was 2015 (5 babies).
This page is the full Name Census profile for Achaius. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
Key insights
- • Fewer than 100 living Americans are believed to carry the name Achaius. It is among the rarest names in the SSA records.
People living today
5
~ 1 in 68,550,868 Americans
Peak year
2015
5 babies that year
Average age
11
years old
2015 SSA rank
#12,113
Tracked since 2015
Popularity
Achaius: popularity over time
Babies born per year
Decades
Achaius by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Achaius during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
| Decade | Male | Female | Total |
|---|---|---|---|
| 2010s | 5 | 0 | 5 |
Origin
Meaning and history of Achaius
The name Achaius is believed to have its roots in ancient Greek origins, derived from the word "Achaios," which referred to the Achaeans, one of the major ethnic groups in ancient Greece. The name has been in use since ancient times, and its earliest recorded mentions can be traced back to classical Greek literature and historical accounts.
In Greek mythology, Achaius was the mythical ancestor of the Achaean people, who played a prominent role in the Trojan War. The name is mentioned in Homer's epic poems, the Iliad and the Odyssey, which date back to the 8th century BC. These ancient texts provide some of the earliest known references to the name.
One of the earliest recorded individuals with the name Achaius was a Greek philosopher and mathematician who lived in the 5th century BC. He is credited with introducing the concept of proportions and was a contemporary of Plato and Aristotle.
During the Byzantine era, the name Achaius gained popularity among the Greek-speaking population of the Eastern Roman Empire. A notable figure with this name was Achaius of Thrace, a 4th-century Christian martyr and saint revered in the Orthodox Church.
In the Middle Ages, the name Achaius appeared in various historical records and chronicles. One notable figure was Achaius, a 9th-century Frankish nobleman who served as a courtier under Charlemagne's successors.
Moving forward in time, the name Achaius continued to be used, albeit less frequently, throughout various periods of history. In the 16th century, Achaius Gasser was a Swiss physician and botanist known for his contributions to the field of pharmacology.
Another noteworthy individual was Achaius Quintus Arrius, a Roman soldier and officer who lived during the 1st century AD. He is mentioned in historical accounts for his role in suppressing a rebellion in Judea.
It's worth noting that while the name Achaius has its roots in ancient Greek culture, it has also been adopted and used in various other cultures and languages over the centuries, although its usage has remained relatively rare compared to other names of Greek origin.
People
Achaius + last name combinations
How many people share a full name with Achaius as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with A
Other first names starting with A with a similar number of bearers.
FAQ
Achaius: questions and answers
How many people in the U.S. are named Achaius?
Name Census puts the figure at roughly 5 living Americans. We arrive at this by taking every SSA birth registration for Achaius going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 68,550,868 US residents.
Is Achaius a common name?
We classify Achaius as "Very Rare". It ranks above 18.2% of all first names in the SSA dataset by living bearers. Across the full history of the data, 5 babies have been registered with this name.
When was Achaius most popular?
The single biggest year for Achaius was 2015, when 5 babies received the name. The fact that the average living Achaius is about 11 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Achaius in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Achaius a male name?
Yes, 100.0% of people registered as Achaius in the SSA data are male. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Achaius still being used today?
Yes. The SSA still recorded Achaius in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Achaius can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
Does every first name have Census demographic data?
No. The public Census first-name release only covers names that met the Bureau's publication rules, so many rarer names in the SSA files do not have a published Census demographic snapshot. In those cases, the page still shows the SSA trend, gender history, and state data.
How many people are called Achaius?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.