Where does “cyprium” come from?

cyprium (Latin) comes from Ancient Greek Κύπρος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “cyprium”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Κύπρος	Cyprus
2	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
3	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems