Cosha appears to be a modern coined name with uncertain roots, likely created for sound and style.
Cosha appears to be a modern coined name with uncertain roots, likely created primarily for sound and style. That kind of invention is common in contemporary naming, where the look and rhythm of a name can matter as much as any fixed etymology.
The result is a name that feels sleek, compact, and lightly musical. Cosha has an approachable softness, but it also has enough rarity to make it memorable. Because it does not lean on a long historical backstory, its appeal comes from its clean shape and contemporary feel.