Where does “onto-” come from?

onto- (Polish) comes from Ancient Greek ὤν, from Ancient Greek εἰμί, from Proto-Hellenic ehmi, from Proto-Indo-European h₁ésmi, from Proto-Indo-European h₁ēs- — to be.

onto- (Polish): onto

Definitions

onto

Ancestry of “onto-”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὤν	present participle of εἰμί; actual, real
2	Ancient Greek	εἰμί	To be, exist; live; To be; it is possible
3	Proto-Hellenic	ehmi	to be
4	Proto-Indo-European	h₁ésmi	first-person singular present indicative of...
5	Proto-Indo-European	h₁ēs-	to be

Every word from Proto-Indo-European h₁ēs- →Every word from Proto-Indo-European h₁ésmi →Every word from Proto-Hellenic ehmi →