Cassien is a very rare variant of Casen that peaked in 2019 and has since faded.
Cassien is a boy name. In 2025 it ranked #12,368 for boy births in the United States (and #25,494 across all names), given to 5 babies. Cassien was first reported in SSA data in 2018 and peaked in 2019 (7 births).
Boys named Cassien per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 2018–2025 · 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