Ali Shams al-Din ibn Ibrahim (Arabic: علي شمس الدين بن إبراهيم, romanized: ʿAlī Shams al-Dīn ibn Ibrāhīm) was the thirteenth Tayyibi Isma'ili Dāʿī al-Muṭlaq in Yemen, from 1329 to his death in 1345.[1]