Where does “Otus” come from?

Otus (Latin) comes from Ancient Greek Ὦτος, from Ancient Greek οὖς, from Ancient Greek ὀδούς, from Proto-Hellenic odónts, from Proto-Indo-European h₃dónts, from Proto-Indo-European h₁ed- — to eat.

Otus (Latin): Otus, a giant in Greek mythology and brother of Ephialtes