Seiji — #9028 US boys' name

What the Data Says About Seiji

The Social Security Administration has registered 509 babies named Seiji between 1914 and 2024, spanning 111 consecutive years of U.S. birth records. As a boy's name, Seiji currently holds the #9028 rank among boys for 2024. The name reached its historical peak in 2007, when 19 babies received it in a single year.

Decade-level aggregation shows that Seiji performed strongest in the 2000s, accumulating 116 births during that ten-year window. Across the 9 decades of recorded activity, Seiji shows notable generational variation in parental adoption. Geographically, the name is most concentrated in Hawaii, which accounts for 32 births — the largest state-level total in the dataset — followed by California. In total, SSA state-level files list Seiji in 2 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Seiji in our reference dataset. These figures derive from SSA's annual national and state-level name files, which include any name appearing at least five times in a given year or state-year; names below that threshold are suppressed for privacy and therefore excluded from the totals shown here. The 509 total represents a lower bound — actual usage may be higher in years or states where the count fell below the disclosure floor. This page is provided for informational and research purposes only and does not constitute personal, legal, or naming advice.