Cinnamon; also a variant of Cassia
Casia is a rare botanical name derived from the cassia plant, which produces a spice similar to cinnamon. It is often used as a simplified spelling of the Latin name Cassia, which has roots in the Roman family name Cassius. In some contexts, it is also associated with the Greek word for 'pure'.
Fewer than 5 girls were named Casia in 2025.
US births per 5-year period, 1990–present (SSA data).
