Sebastain — #9979 US boys' name

What the Data Says About Sebastain

The Social Security Administration has registered 500 babies named Sebastain between 1918 and 2024, spanning 107 consecutive years of U.S. birth records. As a boy's name, Sebastain currently holds the #9979 rank among boys for 2024. The name reached its historical peak in 2002, when 24 babies received it in a single year.

Decade-level aggregation shows that Sebastain performed strongest in the 2000s, accumulating 176 births during that ten-year window. Across the 8 decades of recorded activity, Sebastain shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 5 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Sebastain in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Sebastain 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 500 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.