Gillermo — boys' name

What the Data Says About Gillermo

The Social Security Administration has registered 633 babies named Gillermo between 1922 and 2011, spanning 90 consecutive years of U.S. birth records. As a boy's name, Gillermo currently falls outside the top 1,000 boys' names for 2011. The name reached its historical peak in 1993, when 21 babies received it in a single year.

Decade-level aggregation shows that Gillermo performed strongest in the 1990s, accumulating 138 births during that ten-year window. Across the 10 decades of recorded activity, Gillermo shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 140 births — the largest state-level total in the dataset — followed by Texas. In total, SSA state-level files list Gillermo in 2 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Gillermo 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 633 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.