Castulo — boys' name

What the Data Says About Castulo

The Social Security Administration has registered 116 babies named Castulo between 1914 and 2018, spanning 105 consecutive years of U.S. birth records. As a boy's name, Castulo currently falls outside the top 1,000 boys' names for 2018. The name reached its historical peak in 1924, when 9 babies received it in a single year.

Decade-level aggregation shows that Castulo performed strongest in the 1920s, accumulating 43 births during that ten-year window. Across the 9 decades of recorded activity, Castulo shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Texas, which accounts for 39 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Castulo in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Castulo 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 116 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.