Vain; cinnamon; or a diminutive of Catherine
Casha is a rare name with multiple potential roots. It is often used as a phonetic variation of the Sanskrit name Kasha (meaning 'shining') or the Polish Kasia, a diminutive of Catherine. In some contexts, it is associated with the Cassia tree, which produces a cinnamon-like spice.
Less common today
Casha isn't in the latest US Top 1000. It last peaked at #6,890 in 1993.
US births per 5-year period, 1990βpresent (SSA data).