Teysean
An Americanized variant of the Irish name Tiaghshean or Tighearnán meaning "lord".
Name Census estimates that about 5 living Americans carry the first name Teysean. The name is used almost exclusively for boys. The average person named Teysean today is around 21 years old, and the year with the single highest number of Teysean births was 2005 (5 babies).
This page is the full Name Census profile for Teysean. 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 Teysean. It is among the rarest names in the SSA records.
People living today
5
~ 1 in 68,550,868 Americans
Peak year
2005
5 babies that year
Average age
21
years old
2005 SSA rank
#13,169
Tracked since 2005
Popularity
Teysean: popularity over time
Babies born per year
Decades
Teysean 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 Teysean during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
| Decade | Male | Female | Total |
|---|---|---|---|
| 2000s | 5 | 0 | 5 |
Origin
Meaning and history of Teysean
The name Teysean has its origins in the ancient Celtic culture, dating back to the 5th century AD. It is believed to have derived from the Old Irish word "taiseach," which means "leader" or "chieftain." This name was commonly used among the Celtic tribes that inhabited the British Isles and parts of Western Europe during the Middle Ages.
One of the earliest recorded instances of the name Teysean can be found in the Annals of Ulster, an ancient Irish chronicle that documents events from the 5th to the 16th centuries. In this text, a Gaelic chieftain named Teysean mac Fáelmóir is mentioned as having led his clan in a victorious battle against rival tribes in the year 612 AD.
Throughout the medieval period, the name Teysean was particularly popular among the Gaelic nobility and warrior class. It was seen as a strong and powerful name, symbolizing leadership and bravery. Several notable figures in Irish history bore this name, including Teysean Ó Briain, a prominent king of Munster who ruled in the 11th century.
In the 13th century, the name Teysean appeared in the Welsh epic poem "Y Gododdin," which celebrated the heroic deeds of a Celtic warrior band. The poem mentions a warrior named Teysean ap Gwilym, who was renowned for his valor and skill in battle.
As the centuries passed, the name Teysean continued to be used across various Celtic regions, though its popularity waxed and waned. In the 16th century, a Scottish clan chief named Teysean MacLeod was known for his fierce defense of his lands against English invaders.
Other notable historical figures with the name Teysean include Teysean O'Conor, an Irish chieftain who fought against the English during the Tudor conquest of Ireland in the 16th century, and Teysean MacCarthy, a 17th-century Irish soldier who served in the armies of Spain and France.
While the name Teysean has its roots in the ancient Celtic world, it has endured through the ages and remains in use today, albeit less commonly than in past centuries. Its rich history and associations with leadership, bravery, and warrior culture make it a powerful and evocative name with a deep connection to the Celtic heritage.
People
Teysean + last name combinations
How many people share a full name with Teysean as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with T
Other first names starting with T with a similar number of bearers.
FAQ
Teysean: questions and answers
How many people in the U.S. are named Teysean?
Name Census puts the figure at roughly 5 living Americans. We arrive at this by taking every SSA birth registration for Teysean 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 Teysean a common name?
We classify Teysean 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 Teysean most popular?
The single biggest year for Teysean was 2005, when 5 babies received the name. The fact that the average living Teysean is about 21 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 Teysean in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Teysean a male name?
Yes, 100.0% of people registered as Teysean 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 Teysean still being used today?
Yes. The SSA still recorded Teysean 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 Teysean 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 have the name Teysean?
See how many people share the name Teysean on HowManyOfMe.org, our sister site built around that single question.