Brook — #5619 US unisex name

What the Data Says About Brook

The Social Security Administration has registered 10,597 babies named Brook between 1931 and 2024, spanning 94 consecutive years of U.S. birth records. As a girl's name, Brook currently holds the #5619 rank among girls for 2024. The name reached its historical peak in 1980, when 405 babies received it in a single year. Brook is classified as unisex in SSA records: the opposite-sex variant accounts for 3,376 additional births since 1915.

Decade-level aggregation shows that Brook performed strongest in the 1990s, accumulating 3,009 births during that ten-year window. Across the 10 decades of recorded activity, Brook shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 974 births — the largest state-level total in the dataset — followed by Texas and Michigan. In total, SSA state-level files list Brook in 41 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Brook 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 10,597 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.