He found a coyn on the ground.

He found a coyne on the ground.

I found a bag of coynes in the attic.

I found some coyns on the ground.

The Coynes are a lovely family.

My friend's last name is Coyne.

Her coyness made it difficult for him to understand her true feelings.

Her coynesses were evident in her shy smile and downcast eyes.

My friend's last name is Coyner.

The Coyners are a friendly family who live next door.