Cassian has been given to about 2,907 people in the United States since 1880. It was most common in 2025, which makes it a current name.
Cassian ranks 479th among American boys in 2025, with 633 born that year. Its best year was 2025, when 633 babies were given the name, ranking 479th. The typical living American called Cassian is about 3 years old today. It is relatively most common in Alaska, where it accounts for 0.13% of births.
Source: US Social Security Administration, national and state name files, 2025 release, and the Office for National Statistics for England and Wales. Etymology researched and written by our editors. Living-population and median-age figures are our own estimates, described in the methodology.