A major mystic regarded as the pioneer of Islamization in West Sumatra (Minangkabau) (c. 1646–1704). Born "Pono," he studied for about thirty years in Aceh under Syekh Abdurrauf al-Singkili, receiving the Shattariyah (Şattâriyye) order (en.wikipedia, "Burhanuddin Ulakan"; official Padang Pariaman Regency site; Wikidata Q25463994). Around 1680 he returned to Ulakan, founded a surau (Surau Gadang), and spread the Shattariyah throughout Minangkabau. His tomb in Ulakan is the center of the annual "Basapa" pilgrimage in the month of Safar, drawing pilgrims from West Sumatra, Malaysia, Singapore and Brunei; the tomb was designated a national cultural heritage in 2025. (Some sources give a death year of 1691, but the academic weight favors 1704.)