Masao — boys' name

What the Data Says About Masao

The Social Security Administration has registered 1,018 babies named Masao between 1907 and 2019, spanning 113 consecutive years of U.S. birth records. As a boy's name, Masao currently falls outside the top 1,000 boys' names for 2019. The name reached its historical peak in 1918, when 81 babies received it in a single year.

Decade-level aggregation shows that Masao performed strongest in the 1920s, accumulating 453 births during that ten-year window. Across the 8 decades of recorded activity, Masao shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Hawaii, which accounts for 519 births — the largest state-level total in the dataset — followed by California and Washington. In total, SSA state-level files list Masao in 4 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Masao 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 1,018 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.