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The short answer
Cassian is a masculine name used in Ancient Roman. Behind the Name describes it this way: "From the Roman cognomen Cassianus, which was derived from the family name Cassius. This was the name of several saints, including a 3rd-century martyr from Tangier who is the patron saint of stenographers and a 5th-century mystic who founded a monastery in Marseille." It ranked #479 for boys in the United States in 2025.
Meaning and etymology
According to Behind the Name, from the Roman cognomen Cassianus, which was derived from the family name Cassius. This was the name of several saints, including a 3rd-century martyr from Tangier who is the patron saint of stenographers and a 5th-century mystic who founded a monastery in Marseille. The entry lists its usage as Ancient Roman (Anglicized).
Editorial confidence: likely
Popularity
Cassian ranked #479 for boys in the United States in 2025. The figure comes from the Social Security Administration's national file for that year.
| Region | Year | Rank | Source |
|---|---|---|---|
| United States | 2025 | #479 | ssa-2025 |
If you like this name
Names that Behind the Name files under the same origin (Ancient Roman) and that sit near Cassian in the 2025 American rankings.
Similar by origin
Frequently asked questions
What does the name Cassian mean?
Behind the Name does not give Cassian a one-word meaning. It describes the name as follows: from the Roman cognomen Cassianus, which was.
Is Cassian a popular name?
Cassian ranked #479 for boys in the United States in 2025. (Social Security Administration data).
Is Cassian a boy's or a girl's name?
In the 2025 SSA data Cassian appears in the boys' list; Behind the Name labels it masculine.
Sources
- Behind the Name: Meaning, origin and history of the name Cassian — supports meaning, usage, pronunciation, variants.
- U.S. Social Security Administration: Popular Baby Names — national data, year of birth 2025 — supports popularity.
