Where does “Pelagie” come from?

Pelagie (English) comes from French Pélagie, from Latin Pelagia, from Ancient Greek Πελαγία, from Ancient Greek -ῐ́ᾱ, from Proto-Indo-European -íh₂, from Proto-Indo-European -h₂ — Creates collective nouns, which refer to groups...

Ancestry of “Pelagie”, step by step

Pelagie traces back through two separate lines of ancestry.

via French Pélagie

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

via Italian Pelagie

Step	Language	Word	Meaning
1	Italian	Pelagie	Pelagian Islands, Pelagies, Pelagie
2	Latin	Pelagiae	—

Every word from Proto-Indo-European -h₂ →Every word from Ancient Greek -ῐ́ᾱ →Every word from Ancient Greek Πελαγία →