
Hellhounds are supernatural dogs in folklore & are originally from the Underworld. That have been in many mythologies around the global. They are also called: Black Dog, Black Shuck, Barghest, Churchyard Beast, Black Angus, Padfoot, & many others. Some key features are mangled black fur, glowing red eyes, super strength and speed, ghostly/phantom characteristics, & a nasty odor.
The Hellhound has been seen several times throughout history, and it is not specific to any one place, but they are commonly associated with graveyards and the underworld. The most recent sightings occurred in Connecticut, Kentucky, Louisiana, Ohio, and Vilseck, Germany, in or near cemeteries.”
Sources & Further Reading:
https://mythology.wikia.org/wiki/Hellhound
https://en.wikipedia.org/wiki/Hellhound
https://unnaturalworld.fandom.com/wiki/Hellhounds
https://mythology.net/mythical-creatures/hellhound/
https://supernatural.fandom.com/wiki/Hellhounds
https://arrow.fandom.com/wiki/Hellhounds
http://www.supernaturalwiki.com/index.php?title=Hellhound
https://bloodrayne-mia-the-vampire-slayer.fandom.com/wiki/Hellhounds
P.S. I am well aware 4 of these are TV series/movie, but they had some good info about hellhounds so I include it; & lets not forget about the entertainment value.