Where does “Orestes” come from?

Orestes comes from Ancient Greek Ὀρέστης, derived from ὄρνυμι meaning to rouse or stir, itself from Proto-Indo-European h₃er- and steh₂-, roots relating to rising and standing.

Ancestry of “Orestes”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Ὀρέστης	Orestes
2	Ancient Greek	ἵστημι	to make to stand, to stand, set; to stop, stay,...
3	Proto-Hellenic	hístāmi	to stand
4	Proto-Indo-European	stísteh₂ti	to be standing up, to be getting up
5	Proto-Indo-European	steh₂-	to stand

Every word from Proto-Indo-European steh₂- →

Orestes — Etymology, Origin & Word History | Etymology Explorer