Mecislaus
A masculine name of Polish origin meaning "glorious ruler".
Name Census estimates that about 0 living Americans carry the first name Mecislaus. The name is used almost exclusively for boys. The average person named Mecislaus today is around 0 years old, and the year with the single highest number of Mecislaus births was 1920 (5 babies).
This page is the full Name Census profile for Mecislaus. 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 Mecislaus. It is among the rarest names in the SSA records.
People living today
0
~ - Americans
Peak year
1920
5 babies that year
Average age
-
1920 SSA rank
#4,730
Tracked since 1920
Popularity
Mecislaus: popularity over time
Babies born per year
Decades
Mecislaus 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 Mecislaus during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
| Decade | Male | Female | Total |
|---|---|---|---|
| 1920s | 5 | 0 | 5 |
Origin
Meaning and history of Mecislaus
The name Mecislaus has its origins in the Slavic languages, particularly in the regions of modern-day Poland, Czech Republic, and Slovakia. It is derived from the Proto-Slavic root "męž," meaning "man" or "husband," and the suffix "-slav," which signifies glory or fame. The name can be translated as "famous man" or "glorious man."
One of the earliest recorded mentions of the name Mecislaus can be found in the 12th-century Polish chronicle "Gesta Principum Polonorum" by Gallus Anonymus. The chronicle mentions a Prince Mecislaus I, who ruled the Duchy of Silesia in the late 11th century. He played a significant role in the establishment of the Silesian branch of the Piast dynasty.
In the 13th century, Mecislaus II, also known as Mieszko II the Fat, was the Duke of Opole and Racibórz in Silesia from 1230 to 1246. He is remembered for his conflict with the Teutonic Knights and his efforts to maintain control over Silesian territories.
The name Mecislaus also appears in the annals of the Czech lands. Mecislaus I, Duke of Opava, ruled the Duchy of Opava in the 14th century, from 1318 to 1349. He was a prominent figure during the reign of King John of Bohemia and played a crucial role in the conflicts between the Luxembourgs and the Piasts.
In the 15th century, Mecislaus III, also known as Mieszko III the Old, was the Duke of Racibórz and Opava from 1423 to 1452. He is notable for his long reign and his involvement in the Hussite Wars, where he supported the Catholic cause against the Hussites.
Another notable figure with the name Mecislaus was Mecislaus Haak, a 17th-century Polish philosopher and mathematician. Born in 1590, he made significant contributions to the field of mathematics and was a pioneer in the development of calculus. He is often considered one of the most influential Polish mathematicians of his time.
While the name Mecislaus has its roots in the Slavic regions, it has also gained recognition in other parts of Europe, particularly in the Catholic tradition. Several saints and notable religious figures have borne this name, including Saint Mecislaus of Bohemia, who lived in the 13th century and is venerated as a martyr in the Catholic Church.
People
Mecislaus + last name combinations
How many people share a full name with Mecislaus as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with M
Other first names starting with M with a similar number of bearers.
FAQ
Mecislaus: questions and answers
How many people in the U.S. are named Mecislaus?
Name Census puts the figure at roughly 0 living Americans. We arrive at this by taking every SSA birth registration for Mecislaus 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 - US residents.
Is Mecislaus a common name?
We classify Mecislaus as "Very Rare". It ranks above 2.9% 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 Mecislaus most popular?
The single biggest year for Mecislaus was 1920, when 5 babies received the name. The fact that the average living Mecislaus is about 0 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 Mecislaus in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Mecislaus a male name?
Yes, 100.0% of people registered as Mecislaus 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 Mecislaus still being used today?
Yes. The SSA still recorded Mecislaus 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 Mecislaus 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 Americans are named Mecislaus?
HowManyOfMe.org, our sister site, answers that with the living-bearer count in one glance.