Where does “όταν” come from?

όταν (Greek) comes from Ancient Greek ὅταν, from Greek αν, from Ancient Greek ἐάν, from Ancient Greek εἰᾰ́ν, from Ancient Greek εἰ, from Proto-Indo-European h₁ey.

όταν (Greek): when, while, during, whenever, if

Definitions

when, while, during, whenever, if

Ancestry of “όταν”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὅταν	whenever, when
2	Greek	αν	if; whether
3	Ancient Greek	ἐάν	if (for more depth see εἰ and ἄν; Used in place...
4	Ancient Greek	εἰᾰ́ν	—
5	Ancient Greek	εἰ	if
6	Proto-Indo-European	h₁ey	—

Every word from Proto-Indo-European h₁ey →Every word from Ancient Greek εἰ →Every word from Ancient Greek εἰᾰ́ν →