Mbah Maridjan, Indonesian spiritual leader (b. 1927)
Mas Penewu Surakso Hargo, better known as Mbah Maridjan ("Grandfather Maridjan") (5 February 1927? – 26 October 2010) was the spiritual guardian or "gatekeeper" of the Indonesian volcano Mount Merapi. His birthplace was in the mountainside hamlet (Javanese language-dukuh) of Kinahrejo, Umbulharjo Village, Cangkringan District, of the Sleman Regency, on the island of Java in Indonesia.

He was killed at the age of 83 by a pyroclastic flow that destroyed his home in the village of Kinahrejo during the 2010 eruption of Mount Merapi.