The Mudar and Rabi'a are recorded in central Arabia in the Arabic histories of the pre-Islamic period; the kings of the Kindah bore the title of "king of the Ma'add (or Mudar) and Rabi'a", and they played a role in the conflicts with the Yemeni (southern Arab) tribes.
Even the conflict between the Yemeni and northern tribes is considered by some modern scholars to be a later invention, reflecting the tribal rivalries of the Umayyad period rather than the realities of pre-Islamic Arabia.
[1] After the collapse of the Kindah kingdom, the Mudar of central Arabia came under the control of the Lakhmid kings of al-Hira during the reign of al-Mundhir III.
[1] The Mudar dominated Mecca after driving out the Jurhum, and held some of the religious offices connected with the Ka'aba sanctuary.
Unlike the Rabi'a, who converted to Christianity in large numbers, the Mudar remained attached to the traditional polytheistic religion.