Themis is a very rare variant of Thomas that peaked in 1916 and remains in steady use.
Themis is predominantly a girl name. In 2025 it ranked #17,046 for girl births in the United States (and #28,182 across all names), given to 5 babies. Themis first appears in 1916 and peaked in 1916 (5 births).
Girls named Themis per year · hover for count and girls rank · Source: U.S. Social Security Administration, national data 1916–2025 · U.S.+territories from SSA territory files (1998–2025)
Boys named Themis
Boys named Themis per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 1916–2025 · U.S.+territories from SSA territory files (1998–2025)