Siwoo — boys' name

What the Data Says About Siwoo

The Social Security Administration has registered 28 babies named Siwoo between 2008 and 2025, spanning 18 consecutive years of U.S. birth records. As a boy's name, Siwoo currently falls outside the top 1,000 boys' names for 2025. The name reached its historical peak in 2025, when 7 babies received it in a single year.

Decade-level aggregation shows that Siwoo performed strongest in the 2020s, accumulating 17 births during that ten-year window. Across the 3 decades of recorded activity, Siwoo shows a stable profile with only moderate drift from its peak decade.

No etymological entry is currently available for Siwoo 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 28 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.