Theory is a very rare name used for both girls and boys that has climbed to its highest level yet, peaking in 2022.
Theory is predominantly a girl name. In 2025 it ranked #6,092 among girls (20) and #8,187 among boys (10) — overall #8,062 across all names. The charts below show girls and boys separately.
Girls named Theory per year · hover for count and girls rank · Source: U.S. Social Security Administration, national data 2006–2025 · 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
Boys named Theory · 10 in 2025
Boys named Theory per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 2006–2025 · 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