Fionn — #4605 US boys' name

What the Data Says About Fionn

The Social Security Administration has registered 657 babies named Fionn between 1973 and 2024, spanning 52 consecutive years of U.S. birth records. As a boy's name, Fionn currently holds the #4605 rank among boys for 2024. The name reached its historical peak in 2018, when 40 babies received it in a single year.

Decade-level aggregation shows that Fionn performed strongest in the 2010s, accumulating 297 births during that ten-year window. Across the 5 decades of recorded activity, Fionn shows notable generational variation in parental adoption. Geographically, the name is most concentrated in California, which accounts for 52 births — the largest state-level total in the dataset — followed by New York and Massachusetts. In total, SSA state-level files list Fionn in 4 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Fionn 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 657 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.