Alonzo — #512 US boys' name

What the Data Says About Alonzo

The Social Security Administration has registered 45,360 babies named Alonzo between 1880 and 2024, spanning 145 consecutive years of U.S. birth records. As a boy's name, Alonzo currently holds the #512 rank among boys for 2024. The name reached its historical peak in 2022, when 651 babies received it in a single year.

Decade-level aggregation shows that Alonzo performed strongest in the 2010s, accumulating 5,250 births during that ten-year window. Across the 15 decades of recorded activity, Alonzo shows notable generational variation in parental adoption. Geographically, the name is most concentrated in California, which accounts for 5,085 births — the largest state-level total in the dataset — followed by Texas and Illinois. In total, SSA state-level files list Alonzo in 44 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Alonzo 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 45,360 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.