Sister — girls' name

What the Data Says About Sister

The Social Security Administration has registered 563 babies named Sister between 1883 and 1946, spanning 64 consecutive years of U.S. birth records. As a girl's name, Sister currently falls outside the top 1,000 girls' names for 1946. The name reached its historical peak in 1914, when 21 babies received it in a single year.

Decade-level aggregation shows that Sister performed strongest in the 1910s, accumulating 160 births during that ten-year window. Across the 7 decades of recorded activity, Sister shows a clear decline from its mid-century high. Geographically, the name is most concentrated in Pennsylvania, which accounts for 12 births — the largest state-level total in the dataset — followed by New York. In total, SSA state-level files list Sister in 2 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Sister 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 563 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.