Jillyn — girls' name

What the Data Says About Jillyn

The Social Security Administration has registered 171 babies named Jillyn between 1950 and 2002, spanning 53 consecutive years of U.S. birth records. As a girl's name, Jillyn currently falls outside the top 1,000 girls' names for 2002. The name reached its historical peak in 1976, when 10 babies received it in a single year.

Decade-level aggregation shows that Jillyn performed strongest in the 1970s, accumulating 57 births during that ten-year window. Across the 6 decades of recorded activity, Jillyn shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Utah, which accounts for 7 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Jillyn in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Jillyn 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 171 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.