Alhazred the Arackgna

"(A) mad poet of Sanaá, in Yemen, who is said to have flourished during the period of the Ommiade caliphs, circa 700 A.D. He visited the ruins of Babylon and the subterranean secrets of Memphis and spent ten years alone in the great southern desert of Arabia - the Roba el Khaliyeh or "Empty Space" of the ancients - and "Dahna" or "Crimson" desert of the modern Arabs, which is held to be inhabited by protective evil spirits and monsters of death. Of this desert many strange and unbelievable marvels are told by those who pretend to have penetrated it. In his last years Alhazred dwelt in Damascus."

- HPL, History of the Necronomicon.