I asked here about someone who changed his minhagim and the obligations of his descendants. My great-grandfather's grandfather, was the rebbe of the town of Czyczkow, near Chojnice (Choynitz, Cheunitz) and Radún* (also spelled Radin or Raden in some non-Polish sources) in northern Poland.** Does anyone know anything about this chassidus or resources which I could consult?
*Of Chofetz Chaim fame.
**My great-grandfather was named Yosef b' Mordechai, presumably after R' Yoshke of Czyczkow, his grandfather.