boy's name
Seiji
- Origin Japanese
- Gender Boy
- Syllables 2
- Letters 5
- Popularity Rare
- Births on record 573
Seiji is a boy's name with 2 syllables. In 2025 it was given to 8 babies in the United States. It is a rare choice.
- Seiji is a name of Japanese origin.
- Peaked in 2007, when 19 babies were given the name.
- It has been falling over the past decade.
- Today about 1 in 414,422 babies in the United States is given this name.
- First appears in US birth records in 1914.
- 2 syllables, with the stress on syllable 1.
Seiji over time
Births per decade in the United States, 1910s to 2020s. The striped bar is the 2020s, still in progress — it covers 2020 to 2025, not a full ten years.
Show the numbers
| Decade | Births |
|---|---|
| 1910s | 16 |
| 1920s | 74 |
| 1930s | 22 |
| 1970s | 28 |
| 1980s | 31 |
| 1990s | 75 |
| 2000s | 116 |
| 2010s | 106 |
| 2020s (to 2025) | 49 |
How popular is Seiji?
In 2025, Seiji was given to 8 babies in the United States. It is a rare choice.
Where Seiji is used
US figures omit any name given to fewer than five babies in a year, so the rarest names are absent from the source rather than absent from use. Data & sources.
Names that peaked alongside Seiji
These names rose and fell in the same era, which is why they tend to sound like they belong together.
Parents who like Seiji also like
Names whose popularity has risen and fallen in step with Seiji over the last century — the same taste, a different name.
Sibling names for Seiji
Names from the same era that won't rhyme or share an initial with Seiji — the two things that make a sibling set grate.
Common questions about Seiji
How popular is the name Seiji?
In 2025, Seiji was given to 8 babies in the United States. It is a rare choice.
Is Seiji a girl's or a boy's name?
Seiji is given almost entirely to boys in birth records.
How many syllables are in Seiji?
Seiji has 2 syllables.
When was Seiji most popular?
Seiji peaked in 2007, when 19 babies were given the name. It has been falling over the past decade.
Is Seiji a good name?
That is not something records can settle, but they can tell you what you would be choosing. Seiji currently ranks #9,566 in the United States. It has been falling over the past decade. Everything else — how it sounds with your surname, who it reminds you of — is yours.