Seiji
Boy nameSeiji has been given to 517 babies in the U.S. since 1914. It peaked in 2007. In 2025, about 1 in 213,510 boys was named Seiji.
Popularity over time births per year, 1880–2025
Total babies
517
Peak year
2007 (19 babies)
Rank in 2025
Below top 1000
First recorded
1914
10-year trend
▼ -27%
Gender split
All boys
Names with a similar vibe
Same primary gender, peaked around the same years, and roughly as common as Seiji.
Sibling name ideas for Seiji
Same era and popularity as Seiji, avoiding matching initials or rhymes.
FAQ
How popular is the name Seiji?
Seiji has been given to 517 babies in the U.S. since 1914. It ranked below the top 1000 in 2025.
When did the name Seiji peak?
Seiji peaked in 2007, when 19 babies were given the name.
Is Seiji a girl or boy name?
Seiji is primarily a boy name (100% of babies named Seiji are boys).
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