Jillyan — girls' name

What the Data Says About Jillyan

The Social Security Administration has registered 291 babies named Jillyan between 1978 and 2014, spanning 37 consecutive years of U.S. birth records. As a girl's name, Jillyan currently falls outside the top 1,000 girls' names for 2014. The name reached its historical peak in 1999, when 17 babies received it in a single year.

Decade-level aggregation shows that Jillyan performed strongest in the 2000s, accumulating 118 births during that ten-year window. Across the 5 decades of recorded activity, Jillyan shows notable generational variation in parental adoption.

No etymological entry is currently available for Jillyan 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 291 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.