E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Ghe’bers or Gue’bres.
The original natives of Iran (Persia), who adhered to the religion of Zoroaster, and (after the conquest of their country by the Arabs) became waifs and outlaws. The term is now applied to fire-worshippers generally. Hanway says that the ancient Ghebers wore a cushee or belt, which they never laid aside.
