Where does “Scythia” come from?

Scythia derives from Latin Scythia, from Ancient Greek Σκυθία, formed with the suffix Ancient Greek -ῐ́ᾱ.

Ancestry of “Scythia”, step by step

Step	Language	Word	Meaning
1	Latin	Scythia	—
2	Ancient Greek	Σκυθία	—
3	Ancient Greek	-ῐ́ᾱ	{{l\|en\|-ia}}; "suffix forming abstract feminine...
4	Proto-Indo-European	-íh₂	—
5	Proto-Indo-European	-h₂	Creates collective nouns, which refer to groups...