A Halvetî sheikh of Urfa known as 'Yakup Halife al-Ruhâwî'. In the Halvetî lineage he appears as a deputy of Sheikh Nasûh Efendi and is described in the sources with honorifics such as 'chief of the wayfarers and pride of the knowers'. He is said to have founded a Halvetî lodge near Urfa's Kurtuluş Square, and the quarter where his grave lies came to be called 'Yakubiye' after him. His exact date of death is unknown, though he is recorded to have died after 1619. His tomb stands at the foot of Urfa Castle, southwest of Lake Ayn Zeliha.