Where does “Gergesenus” come from?

Gergesenus (Latin) comes from Ancient Greek Γερασηνός, from Ancient Greek -ηνός, from Ancient Greek -νός, from Proto-Indo-European dʰeh₁- — to do, put, place.

Ancestry of “Gergesenus”, step by step

Gergesenus traces back through two separate lines of ancestry.

via Ancient Greek Γερασηνός

Step	Language	Word	Meaning
1	Ancient Greek	Γερασηνός	—
2	Ancient Greek	-ηνός	-ian, -ese
3	Ancient Greek	-νός	Alternative form of -νος
4	Proto-Indo-European	dʰeh₁-	to do, put, place

via Ancient Greek Γεργεσηνός

Step	Language	Word	Meaning
1	Ancient Greek	Γεργεσηνός	—
2	Ancient Greek	Γέργεσα	—

Every word from Proto-Indo-European dʰeh₁- →Every word from Ancient Greek -ηνός →Every word from Ancient Greek -νός →