Kayin — boys' name

What the Data Says About Kayin

The Social Security Administration has registered 540 babies named Kayin between 1977 and 2023, spanning 47 consecutive years of U.S. birth records. As a boy's name, Kayin currently falls outside the top 1,000 boys' names for 2023. The name reached its historical peak in 2001, when 31 babies received it in a single year. Kayin is classified as unisex in SSA records: the opposite-sex variant accounts for 82 additional births since 2001.

Decade-level aggregation shows that Kayin performed strongest in the 2000s, accumulating 261 births during that ten-year window. Across the 5 decades of recorded activity, Kayin shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 7 births — the largest state-level total in the dataset — followed by Illinois. In total, SSA state-level files list Kayin in 2 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Kayin 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 540 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.