Ummmmmmmm so yeah about the name.....

I looked it up and there is already a amethyst version thats been made. does that affect ours at all? Also I was looking up japanese words for the Island and I found
Kakkazan
Which means active Volcano in Japanese.

for the name i looked around too, and i dont think the other one its that popular, but we can always change the name if we think of a better one.

As for the valcano thing that could be the name of a mountin or town, but the region is already knamed kozu

Then yes it should be the name of a mountain I thinks