Barguest

Barghest, Bargtjest, Bo-guest, Bargheist, Bargeist, Barguist, Bargest or Barguest is the name often given in the North of England, especially in Yorkshire, to a legendary monstrous black dog with huge teeth and claws, though in other cases the name can refer to a ghost or household elf, especially in Northumberland and Durham (see Cauld Lad of Hylton).