Jacolyn — girls' name

What the Data Says About Jacolyn

The Social Security Administration has registered 380 babies named Jacolyn between 1931 and 1999, spanning 69 consecutive years of U.S. birth records. As a girl's name, Jacolyn currently falls outside the top 1,000 girls' names for 1999. The name reached its historical peak in 1953, when 20 babies received it in a single year.

Decade-level aggregation shows that Jacolyn performed strongest in the 1950s, accumulating 146 births during that ten-year window. Across the 7 decades of recorded activity, Jacolyn shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 5 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Jacolyn in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Jacolyn 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 380 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.