Olaya (Asturian) comes from Latin Eulalia, from Ancient Greek Εὐλαλία, from Ancient Greek εὔλαλος, from Ancient Greek εὖ, from Ancient Greek ἐΰς, from Proto-Hellenic ehu-, from Proto-Indo-European h₁su-, from Proto-Indo-European h₁wes- — good; to be cheerful, happy; to eat, to feast.