Cerberus appears in Hellenic religion.
Hesiod’s Theogony places Kerberos among the offspring of Typhon and Echidna — the fifty-headed hell-hound of that early catalog. A named Hellenic underworld hound in that poem, not dog as a species and not jackal.
from Hesiod · Theogony, c. 700 BCE
appears in · sourced · documented