Kei — #4582 US boys' name

What the Data Says About Kei

The Social Security Administration has registered 637 babies named Kei between 1920 and 2024, spanning 105 consecutive years of U.S. birth records. As a boy's name, Kei currently holds the #4582 rank among boys for 2024. The name reached its historical peak in 2015, when 33 babies received it in a single year. Kei is classified as unisex in SSA records: the opposite-sex variant accounts for 186 additional births since 1978.

Decade-level aggregation shows that Kei performed strongest in the 2010s, accumulating 212 births during that ten-year window. Across the 7 decades of recorded activity, Kei shows notable generational variation in parental adoption. Geographically, the name is most concentrated in California, which accounts for 88 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Kei in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Kei 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 637 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.