Sajjada nashin

The Sajjada Nashin (hereditary administrator) also refers as Trusty (a successor) is the descendant of a Sufi or Pir and in some instances descendant of a disciple of a Sufi, A Sajjada particularly tends to the shrine which is made over the Sufi's tomb or grave, known as a Dargah or Mazar. A trusty is a key person who held and leads the traditional Sufi rituals in Dargah's daily activities and particularly during Urs—(death anniversary).

...
Wikipedia