A major Indian Sufi, the central figure of the Firdausiyya branch (d. 782/1381); born in 689/1290 at Maner near Bihar (TDV Encyclopedia of Islam, "Mânerî, Şerefeddin"). He studied at Sonargaon (Dhaka region), affiliated with Najibuddin Firdausi and became the principal representative of the Firdausiyya branch of the Kubrawiyya. He established a khanqah at Bihar (Sharif) and became famous for his letter-collections "Maktubat" (Maktubat-i Sadi: 100 letters; Maktubat-i Du-Sadi: 200 letters) and his "Malfuzat." His tomb, the Badi Dargah, at Bihar Sharif is a major pilgrimage site. Note: the death year is given as 782 AH by Wikidata and 783 AH by TDV (the Gregorian 1381 is stable), and he should not be confused with different saints at Maner Sharif near Patna (transparency note). The coordinate is cross-verified via Wikipedia and Wikimapia.