Where does “Boreus” come from?

Boreus (Translingual) comes from Latin boreus, from Greek βόρειος, from Ancient Greek -εῖος, from Proto-Indo-European -iHwós, from Proto-Indo-European -wós — Creates adjectives from verb stems.

Boreus (Translingual): genus|certain mecopterans}}

Definitions

genus|certain mecopterans}}

Ancestry of “Boreus”, step by step

Step	Language	Word	Meaning
1	Latin	boreus	northern, north, northerly
2	Greek	βόρειος	north, northerly; northerner
3	Ancient Greek	-εῖος	Forms adjectives, usually with a meaning of "of"...
4	Proto-Indo-European	-iHwós	—
5	Proto-Indo-European	-wós	Creates adjectives from verb stems

Every word from Proto-Indo-European -wós →Every word from Ancient Greek -εῖος →Every word from Greek βόρειος →