I have been asked by a cousin to check details of a Rabbi DUNKELANG, who headed or taught in a yeshiva in Jerusalem during the first decades of the 20th cent. It is known that he died sometime between 1929-1942. He may have been connected to Chassidut Alexsander.
I've checked with the prushim and chassidim Hevra Kadisha's in Yerushalayim and neither have this name on their records.