In Islamic tradition , the Aad tribe or Adityas are believed to be the first inhabitants of Arab countries. They are known as the ancient Arabs or the ruined Arabs. After Ader 's death , his sons Shadid and Shedad inherited the kingdom from Aditya. Since then, the word ad has become a collective ad for everyone . On the people of Aad, Allah sent Hud (AS) as a Prophet for them. According to Islamic tradition , the tribe of Aad is the son of Noah (Arabic: سام بن نوح ) , Sam Ibn Nuh) the heir of Sam , who came from the Northeast and was the ancestor of the Adityas. He is Noah (Noah(Son Sam)Sam) , Iram son of Shem (Dharma) , Son of Iram Awad (Uz) (In return) Was. 'Ad and Thamud are two branches of Iram. The Aad community had 13 families or clans. They settled from Amman to Hazaramaut and Yemen. Note that after the flood of Noah, they were the first to start idolatry.