This study, prepared as a doctoral thesis under the supervision of Prof. Hans Joachim Kissling, is essentially a prosopographical investigation of the principal members of the Cerrahiye order of dervishes. As the order does not go back very far in time, but was established only in the early years of the eighteenth century, a reasonable amount of documentation can be located. However the character of the available sources are not basically different from those familiar to the researcher dealing with the fifteenth or sixteenth century. Various hagiographical works survive, composed by members and sympathizers of the order. In addition, the mauseleum of Nureddin Cerrahi, the founder of the order, is still in existence, and the inscriptions upon the gravestones it contains are sufficiently numerous to permit ·the reconstruction of Nureddin Cerrahi' s family tree. When dealing with the sixteenth-century Bayramis or with the followers of Ak Şemseddin, Kissling has had to use s imilar source materials, and so has Abdilibaki Gölpınarlı in his work on the Mevlevis. 

This study, prepared as a doctoral thesis under the supervision of Prof. Hans Joachim Kissling, is essentially a prosopographical investigation of the principal members of the Cerrahiye order of dervishes. As the order does not go back very far in time, but was established only in the early years of the eighteenth century, a reasonable amount of documentation can be located. However the character of the available sources are not basically different from those familiar to the researcher dealing with the fifteenth or sixteenth century. Various hagiographical works survive, composed by members and sympathizers of the order. In addition, the mauseleum of Nureddin Cerrahi, the founder of the order, is still in existence, and the inscriptions upon the gravestones it contains are sufficiently numerous to permit ·the reconstruction of Nureddin Cerrahi' s family tree. When dealing with the sixteenth-century Bayramis or with the followers of Ak Şemseddin, Kissling has had to use s imilar source materials, and so has Abdilibaki Gölpınarlı in his work on the Mevlevis.