Wikipedia
Qahtanite
The terms Qahtanite and Qahtani (; transliterated: Qahtani) refers to Arabs who originate from the southern region of the Arabian Peninsula, especially from Yemen.
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Britannica Online Encyclopedia, 2009, webpage:
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According to Islamic tradition, the Qahtanites are pure Arabs, unlike the Adnanites who are " Arabized Arabs", descended from Adnan. The Qahtani people are divided into the two sub-groups of Himyar (Himyartes) and Kahlan (Kahlanis).