Tau is a very rare boys' name that peaked in 1976 and has since faded.
Tau is a boy name. In 2025 it ranked #13,675 for boy births in the United States (and #28,147 across all names), given to 5 babies. Tau was first reported in SSA data in 1976 and peaked in 1976 (7 births).
Boys named Tau per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 1976–2025 · U.S.+territories from SSA territory files (1998–2025) · SSA publishes a name only in years it was given to at least 5 babies, so a name may have been in use before — or between — the years shown here