ギヤースッディーン
Ghiyath al-Din Muhammad ibn Rashid al-Din Fadlallah (died 1336) was a Persian bureaucrat under the Ilkhanate, who served as the vizier of the last Ilkhan Abu Sa'id Bahadur Khan () from 1327 to 1335. Ghiyath al-Din was the son of Rashid al-Din Hamadani (executed in 1318), the distinguished historian and vizier of the Ilkhans Ghazan Khan () and Öljaitü ().