où (Middle French) comes from Latin aut, from Proto-Italic *auti, from Proto-Indo-European h₂ewti, from Proto-Indo-European h₂ew, from Proto-Indo-European ǵʰe — Postpositional intensifying particle: indeed, at any rate, in fact.
où (Middle French): where
Definitions
where
Ancestry of “où”, step by step
où traces back through two separate lines of ancestry.