Willo — girls' name

What the Data Says About Willo

The Social Security Administration has registered 628 babies named Willo between 1911 and 2023, spanning 113 consecutive years of U.S. birth records. As a girl's name, Willo currently falls outside the top 1,000 girls' names for 2023. The name reached its historical peak in 1924, when 23 babies received it in a single year.

Decade-level aggregation shows that Willo performed strongest in the 1930s, accumulating 166 births during that ten-year window. Across the 9 decades of recorded activity, Willo shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Alabama, which accounts for 33 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Willo in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Willo 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 628 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.