Guilherme — #12479 US boys' name

What the Data Says About Guilherme

The Social Security Administration has registered 514 babies named Guilherme between 1921 and 2024, spanning 104 consecutive years of U.S. birth records. As a boy's name, Guilherme currently holds the #12479 rank among boys for 2024. The name reached its historical peak in 2006, when 39 babies received it in a single year.

Decade-level aggregation shows that Guilherme performed strongest in the 2000s, accumulating 257 births during that ten-year window. Across the 6 decades of recorded activity, Guilherme shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Massachusetts, which accounts for 157 births — the largest state-level total in the dataset — followed by New Jersey and Connecticut. In total, SSA state-level files list Guilherme in 4 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Guilherme 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 514 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.