Greek ghosts

Gello (), in Greek mythology, is a female demon or revenant who threatens the reproductive cycle by causing infertility, miscarriage, and infant mortality. By the Byzantine era, the () were considered a class of beings. Women believed to be under demonic possession by gelloudes might stand trial or be subjected to exorcism.

In Greek mythology, the Taraxippos (; plural: taraxippoi, "horse disturber", latinized as Taraxippus; Latin equorum conturbator) was a presence, variously identified as a ghost or dangerous site, blamed for frightening horses at hippodromes throughout Greece. Some taraxippoi were associated with the Greek hero cults or with Poseidon in his aspect as a god of horses () who brought about the death of Hippolytus. Pausanias, the ancient source offering the greatest number of explanations, regards it as an epithet rather than a single entity.