Below based on research down together with Kobi Liderman, son of Shmuel and Golda/Genia.
Mordka Halpern was born in Ostrowiec on Aug 17 1875 , son of Chaim and Pesla (Blumenfeld). He married Szajndla Wajntraub (b. in Klwow in 1875,daughter or Moszek and Franjndla Franjdrach)
Their first child, Chil, was registered as born in Klwow in 1895, the hometown of his wife, but the rest of their children were born in Ostrowiec: Izral, Symcha/Simon (murdered in Buchenwald in 1945), Bajla Laja, Aron, Pesla, Sura, Zlata.
Chil married Dwora Estera Berkowicz [ daughter of Lejzor Boruch and Jochweta (Wolfowicz) of Kamienna ], and had children Pesla, Jocheta, Cyrla Golda and Rywka registered as being born in Kamienna.
Golda(Genia) married Shmuel Liderman after the Holocaust in Italy and were caught trying to enter Palestine and sent to Cyprus. Later they arrived to Israel.
Golda sent many testimonies to Yad Vashem about her relatives including testimonies of the murder of her grandmother Szajndla and aunts Sura and Zlata of Ostrowiec. Golda and her husband were active participants in the Ostrowiec descendants organization events in Israel.