How Many People Are Named Seichi?
An estimated 4 people in the United States have the first name Seichi. It is almost exclusively a male name. The average bearer is 108 years old, and Seichi peaked in popularity in 1922 with 21 births that year.
Below you will find a full statistical profile of Seichi as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Seichi paired with any surname.
Key Insights
- With an average bearer age of 108, Seichi is a vintage name most associated with earlier generations. Most living bearers were born before 1928.
- Seichi is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
4
About 1 in 85,688,585 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
108
years old
Peak Year
1922
21 births
Total Registered
171
since 1880
Gender Distribution for Seichi
Seichi is almost exclusively a male name. Out of 171 total births registered, 100.0% were male.
Seichi as a male name
Ranked #4,248 in 1931
5 male births in 1931
Peak: 1922 (21 births)
Seichi: Popularity Over Time
SSA records for Seichi span from the 1910s to the 1930s, covering 3 decades of naming data. The most popular decade for this name was the 1920s, when 106 babies were registered. Seichi has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Seichi by Decade
How has Seichi tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Seichi by State
Seichi + Last Name Combinations
How many people share a full name with Seichi as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Seichi
Other first names starting with S with a similar number of bearers.
Seichi: Questions and Answers
How many people in the U.S. are named Seichi?
We estimate approximately 4 people named Seichi are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 85,688,585 Americans share this first name.
Is Seichi a common name?
Seichi is classified as "Very Rare" and is more popular than 6.2% of all first names in the SSA database. A total of 171 births have been registered with this name since 1880.
When was Seichi most popular?
Seichi reached peak popularity in 1922, when 21 babies were given this name. The average age of a living person named Seichi is approximately 108 years old, reflecting when the name was most commonly given.
Is Seichi a male name?
Seichi is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Seichi Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Seichi Smith, Seichi Johnson, Seichi Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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