Marillyn — girls' name

What the Data Says About Marillyn

The Social Security Administration has registered 437 babies named Marillyn between 1920 and 1947, spanning 28 consecutive years of U.S. birth records. As a girl's name, Marillyn currently falls outside the top 1,000 girls' names for 1947. The name reached its historical peak in 1927, when 40 babies received it in a single year.

Decade-level aggregation shows that Marillyn performed strongest in the 1920s, accumulating 231 births during that ten-year window. Across the 3 decades of recorded activity, Marillyn shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Illinois, which accounts for 17 births — the largest state-level total in the dataset — followed by California and Minnesota. In total, SSA state-level files list Marillyn in 6 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Marillyn 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 437 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.