Where does “kokilli” come from?

kokilli (Finnish) comes from French coquille, from Vulgar Latin conchilia, from Latin conchylium, from Ancient Greek κογχύλιον, from Ancient Greek -ῐον, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

kokilli (Finnish): mould, chill mould hollow form into which molten metal is poured to cool