Sunizade Seyit Mehmet Emin Efendi was a seventeenth-century Ottoman scholar and calligrapher and briefly Shaykh al-Islam.
Mehmet Emin was born in 1614. He was the son of SunâÂÂullah Efendi, the qadi of Aleppo, who was also known as Kara SunâÂÂî, thus Mehmet Emin's patronymic Sunizade, âÂÂson of Suni.â Mehmet Emin was said to be a descendant of Emir Sultan on his mother's side; thus his title of seyit. Mehmed Emin completed his education in Istanbul, especially under . He became a novice or assistant () to Osman Hânî ÃÂmer Efendi.
In 1627, Mehmet Emin began as müderris at the (Nià Âancñ Paà Âay-ñ Atîk) Madrasa. In 1630, he was appointed to the Yahya Efendi Madrasa, in 1632 to the Murad Paà Âa (Murad Paà Âay-ñ Cedîd) Madrasa, in 1634 to the Sahn-ñ Semân Madrasa, in 1637 to the à Ââh Sultan Madrasa, in 1639 to the Aya Sofya Madrasa, and in 1640 to the Süleymaniye Madrasa.
He was appointed qadi of Salonica in 1641, but was dismissed in 1643. He was appointed qadi of Aleppo in 1646 and of Cairo in 1647, but was dismissed from Cairo in less than a year. He was appointed qadi of Istanbul in 1649, but was dismissed in 1650. He was appointed kazasker of Anatolia in 1654, but retired in 1655. Nevertheless, he was appointed kazasker of Rumelia in 1657. He was dismissed in 1658 and retired into seclusion ('). However, he was made kazasker of Rumelia for a second time in 1660.
During his term as kazasker, in February 1662, he was appointed Shaykh al-Islam. According to sources of the period, Mehmed Emin was a âÂÂfrivolous personâ ( ) who could not maintain the dignity of his office, and thus was dismissed on the grounds of senility in November 1662. Additional reasons given included âÂÂlack of foreign affairsâ (-ñ sinin bulunmayñà Âñ) and the taking of bribes. Some sources mention also his issuance of a fatwa for the execution of qutb of the Melâmiyye Sufi order Sütçü Beà Âir AÃÂa and his murids.
Mehmed Emin was said to be skilled in taliq calligraphy, which he learned from Dervià  Abdî-i Mevlevi.
Mehmed Emin died in his yalñ in Beà Âiktaà  in July 1665. He was buried near the Aziz Mahmud Hüdâyî Dergâh in ÃÂsküdar. His grave was marked with a large turban ('). Because of repairs and enlargements after the 1894 earthquake, Mehmed Emin's grave may now be underneath the dergah mosque.