Where does “Yaponiya” come from?

Yaponiya (Gagauz) comes from Russian Япо́ния, from Latin Iaponia, from Latin -ia, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Yaponiya”, step by step

StepLanguageWordMeaning
1RussianЯпо́нияJapan
2LatinIaponiaJapan
3Latin-iaUsed to form a feminine abstract noun, usually...
4Latin-iusforming adjectives from nouns; nominative neuter...
5Proto-Italic-jōsForms comparative adjectives
6Proto-Indo-European-yósCreates adjectives from noun or verb stems
Every word from Proto-Indo-European -yós →Every word from Latin -ia →Every word from Latin -ius →