Abd Shams (the Great) of Al-Hirah

Qahtani origins

Arab tradition maintains that a semi-legendary ancestral figure named Qahtan[1][2] and his 24 sons are the progenitors of the southern inhabitants of the Arabian peninsula known as Qahtani. Early Islamic historians identified Qahtan with the Yoqtan (Joktan) son of Eber of the Hebrew Bible (Gen. 10:25-29). Among the sons of Qahtan are noteworthy figures like A'zaal (believed by Arabs to have been the original name of Sana'a, although its current name has been attested since the Iron Age) and Hadhramaut. Another son is Ya'rub, and his son Yashjub is the father of 'Abd Shams, who is also called Saba. All Yemeni tribes trace their ancestry back to this "Saba", either through Himyar or Kahlan, his two sons. The Qahtani people are divided into the two sub-groups of Himyar and Kahlan, who represent the settled Arabs of the south and their nomadic kinsmen (nomads).[2] The Kahlan division of Qahtan consists of 4 subgroups: the Ta' or Tayy, the Azd group which invaded Oman, the 'Amila-Judham group of Palestine, and the Hamdan-Madhhij group who mostly remain in Yemen.[2] The Kahlan branch includes the following tribes:Azd ( Aus and Khazraj, Bariq, Ghassan, Khuza'a and Daws), Hamdan, Khath'am, Bajflah, Madhhij, Murad, Zubaid and Nakh', Ash'ar, Lakhm and Kindah.[3]

http://en.wikipedia.org/wiki/Qahtanite