Where does “Ýaponiýa” come from?

Ýaponiýa (Turkmen) 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 “Ýaponiýa”, step by step

Step	Language	Word	Meaning
1	Russian	Япо́ния	Japan
2	Latin	Iaponia	Japan
3	Latin	-ia	Used to form a feminine abstract noun, usually...
4	Latin	-ius	forming adjectives from nouns; nominative neuter...
5	Proto-Italic	-jōs	Forms comparative adjectives
6	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Latin -ia →Every word from Latin -ius →