Where does “フランス領ポリネシア” come from?

フランス領ポリネシア (Japanese) comes from Japanese フランス, from English France, from French France, from Middle French France, from Old French France, from Latin francia, from Latin -ia, from Latin -ius — Creates adjectives from noun or verb stems.

Ancestry of “フランス領ポリネシア”, step by step

フランス領ポリネシア traces back through 3 separate lines of ancestry.

via Japanese フランス

Step	Language	Word	Meaning
1	Japanese	フランス	France
2	English	France	famously held by
3	French	France	—
4	Middle French	France	—
5	Old French	France	—
6	Latin	francia	nominative plural of francium; accusative plural...
7	Latin	-ia	Used to form a feminine abstract noun, usually...
8	Latin	-ius	forming adjectives from nouns; nominative neuter...
9	Proto-Italic	-jōs	Forms comparative adjectives
10	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

via Japanese ポリネシア

Step	Language	Word	Meaning
1	Japanese	ポリネシア	—
2	English	Polynesia	—
3	French	Polynésie	—
4	Ancient Greek	πολύς	many, a lot of; neuter πολύ or πολλά as...
5	Ancient Greek	πόρος	a means of passage, passageway, way, opening;...
6	Ancient Greek	πείρω	I pierce, run through; I cleave through
7	Proto-Hellenic	*péryō	—

via Japanese 領

Step	Language	Word	Meaning
1	Japanese	領	territory of a country

Every word from Proto-Indo-European -yós →