Thaddius — boys' name

What the Data Says About Thaddius

The Social Security Administration has registered 593 babies named Thaddius between 1916 and 2023, spanning 108 consecutive years of U.S. birth records. As a boy's name, Thaddius currently falls outside the top 1,000 boys' names for 2023. The name reached its historical peak in 1989, when 18 babies received it in a single year.

Decade-level aggregation shows that Thaddius performed strongest in the 1980s, accumulating 116 births during that ten-year window. Across the 12 decades of recorded activity, Thaddius shows a clear decline from its mid-century high.

No etymological entry is currently available for Thaddius 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 593 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.