Meaning & origin
A reliable meaning for Sei isn’t established in our sources yet. Rather than guess, we show what is recorded: how the name is used, how often, and the names it’s connected to.
The story
Published U.S. birth records include this spelling as early as 2007. This is the earliest published observation available here, rather than a date for the name’s origin.
From dated birth records
Sei through the years
- Babies since 1880
- 7
- 7 boys · 0 girls
- Most popular year
- 2007
- 7 babies
- 2025
- 0
- Outside the ranked list
- 2021–25 vs 2016–20
- —
- Too few births to compare
By the numbers
The most recent published U.S. birth count for boys is 7 in 2007. Later missing counts do not mean the name went unused. Published U.S. population figures for this spelling include 338 as a first name in 2020; 280 as a surname in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Sei’s family of names
In Japanese usage, Sei is a Roman-alphabet rendering of 世. In Japanese usage, Sei is a Roman-alphabet rendering of 政. In Greek usage, Sei as a surname is a transliteration of Σέη.
The ring: spellings.
Spellings & scripts 8
The same name written differently, including transliterations into other scripts.
People named Sei
- Sei MuroyaJapanese association football playerborn 1994
- Sei AshinaJapanese actress and model (1983-2020)
- Shō Sei4th king of the Ryukyu Kingdom1497–1555
Listed by how widely each person is written about, which says nothing about the name itself.