Where does “赤道ギニア共和国” come from?

赤道ギニア共和国 (Japanese) comes from Japanese 赤道ギニア, from Japanese ギニア, from English Guinea, from Portuguese Guiné, from English -ia, from Latin -ia, from Latin -ius, from Proto-Italic -jōs — Creates adjectives from noun or verb stems.

Ancestry of “赤道ギニア共和国”, step by step

赤道ギニア共和国 traces back through two separate lines of ancestry.

via Japanese 赤道ギニア

StepLanguageWordMeaning
1Japanese赤道ギニア
2JapaneseギニアGuinea
3EnglishGuineaA gold coin originally worth twenty shillings; later (from 1717 until the adoption of decimal currency) standardised at a value of twenty-one shillings
4PortugueseGuinéGuinea
5English-iaUsed in forming names of countries, diseases,...
6Latin-iaUsed to form a feminine abstract noun, usually...
7Latin-iusforming adjectives from nouns; nominative neuter...
8Proto-Italic-jōsForms comparative adjectives
9Proto-Indo-European-yósCreates adjectives from noun or verb stems

via Japanese 共和国

StepLanguageWordMeaning
1Japanese共和国republic
2Japanesea land, a large place; a country in general, a...
3Old Japanese
Every word from Proto-Indo-European -yósEvery word from Latin -iaEvery word from Latin -ius