What is the meaning of Coyn?

Obsolete spelling of coin.

A wedge (object tapering to a point)

The impression or imagery on a coin; an imprint.

A coin (stamped piece of metal)

Any kind of currency; a token bearing monetary value.

A stone placed in the corner of an arch; a quoin.

A corner, angle, or nook.

A property shaped like a wedge.

quince

Source: wiktionary.org