Mastanesosus (or Sosus or Sus, Punic: 𐤌𐤔𐤕𐤍𐤑𐤍, MŠTNṢN) was a Berber king of Mauretania (modern-day Morocco and Western Algeria) and son of Bocchus I.
[1] The little information known about King Mastanesosus comes from coins bearing the inscription "REX BOCCHVS SOSI F" (Bocchus II son of Sosus),[2] in addition to a reference by Cicero in his book In Vatinum, where he detailed an itinerary by Publius Vatinius through North Africa.
[5] The end of Bocchus I's reign may have been weak due to his old age, and Mastanesosus's reign probably started on shaky grounds, since at the beginning of his rule, Tingi and its region were independent and ruled as such by a princely family, namely by Iephtas, then his son Ascalis.
[1] General Sertorius helped dethrone prince Ascalis around 80–81 BC, and thereby restored King Mastanesosus as ruler over the region of Tangier.
[6][7] Sallustius reports that, around 77–74 BC, a certain person was sent out of Mauretania in the custody of a king named Leptasta,[8] interpreted by Stéphane Gsell to be the same as "Iephtas".