Where does “è” come from?

è (Corsican) comes from Latin et, from Proto-Indo-European éti, from Proto-Indo-European h₁é, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.

è (Corsican): and

Definitions

Ancestry of “è”, step by step

Step	Language	Word	Meaning
1	Latin	et	and; plus; though, even if
2	Proto-Indo-European	éti	beyond; over
3	Proto-Indo-European	h₁é	and, then
4	Proto-Indo-European	ǵʰe	Postpositional intensifying particle: indeed, at any rate, in fact

Every word from Proto-Indo-European ǵʰe →Every word from Proto-Indo-European h₁é →Every word from Proto-Indo-European éti →