Cassian, derived from the Roman family name 'Cassium,' was a popular given name among the early Christians. It is believed to have been used by various martyrs and saints, contributing to its enduring appeal throughout history.
"Cassian experienced a significant increase in popularity over time, with birth numbers steadily rising from just 5 in the late 90s to a peak of 553 in 2023. The name's popularity took a notable leap around 2016-2017, more than doubling in usage within two years."