Mustafa Devati

Sheikh Mustafa Devâtî Efendi was a Jelveti sheikh of the seventeenth century Ottoman Empire. His birthplace and date are not known. He was the son of Arslan Ağa. Since as a youth he worked as a scribe ("divitçi" or "devâtî") he was given the name Devâtî. He became affiliated with the Jelveti order through Muk'ad Ahmed Efendi, a khalifa of Aziz Mahmud Hudayi Efendi. He advanced quickly along the Sufi path and was sent by Muk'ad Ahmed Efendi to guide the people of Kastamonu. After a period there, he returned to Istanbul and joined the ulama. In 1657, he built a tekke (khanqah) in Üsküdar, in the Bülbülderesi Selmanağa neighborhood, called the Şeyhcâmii Tekkesi or the Devâtî Mustafa Efendi Tekkesi. His tomb is in Üsküdar.
References.
"Üsküdarli Meshurlar Ansiklopedisi", pp. 279–280.