Ismail Samani

Abū Ibrāhīm Ismā'īl ibn-i Aḥmad-i Sāmāni, better known simply as Ismail-i Samani, and also known as Isma'il ibn-i Ahmad, was the Samanid amir of Transoxiana and Khorasan. His reign saw the emergence of the Samanids as a powerful force. He was the son of Ahmad ibn-i Asad and a descendant of Saman Khuda, the eponymous ancestor of the Samanid dynasty who renounced Zoroastrianism and embraced Islam.

Source: Wikipedia