 Julhumah's ancestry was traced to Kahlan ibn Saba ibn Ya'rub, great-grandson of Qahtan, the semi-legendary, common ancestor of the Arab tribes of southern Arabia.Julhumah was a direct descendant of Kahlan via Julhumah's father Zayd ibn Yashjub, who in turn was a direct descendant of 'Arib ibn Zayd ibn Kahlan.The two main branches of Tayy were Al al-Ghawth and Al Jadilah.