Sunizade Seyit Mehmet Emin Efendi was a seventeenth-century Ottoman scholar and calligrapher and briefly Shaykh al-Islam.
He was the son of Sun‘ullah Efendi, the qadi of Aleppo, who was also known as Kara Sun‘î, thus Mehmet Emin's patronymic Sunizade, “son of Suni.” Mehmet Emin was said to be a descendant of Emir Sultan on his mother's side; thus his title of seyit.
According to sources of the period, Mehmed Emin was a “frivolous person” (hafif meşreb) 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 “lack of foreign affairs” (umûr-ı hâriciyyesinin bulunmayışı) 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 Beşir Ağa and his murids.