Oizys, goddess of misery
Orphne a Lampad nymph of Hades, mother of Askalaphos
Oreads, the goddesses of Mountains
Orthosie (goddess of welfare) "prosperity"
Ouranos the primeval god of the heavens
Roman Gods and Goddesses Names and Roles
Obarator, God of ploughing
Oceanus the Titan god of the Ocean
Ops or Opis, goddess of resources or plenty. Titan Goddess of fertility and the mother of gods
Orbona, Goddess of parents who lost their children
Orcus, a god of the underworld and punisher of broken oaths.