Where does “Koffer” come from?

Koffer (Luxembourgish) comes from Middle High German cuffer, from Middle High German kupfer, from Old High German kupfar, from Latin cūprum, from Latin cȳprium, from Ancient Greek Κύπρος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Koffer (Luxembourgish): copper

Definitions

copper

Ancestry of “Koffer”, step by step

Step	Language	Word	Meaning
1	Middle High German	cuffer	—
2	Middle High German	kupfer	—
3	Old High German	kupfar	copper
4	Latin	cūprum	copper (the metal)
5	Latin	cȳprium	—
6	Ancient Greek	Κύπρος	Cyprus
7	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
8	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐος →Every word from Ancient Greek Κύπρος →