Below based on research done together with children of  Shmuel and Genia Liderman; Dvora (Shacnay) , Arela (Levinstein) and Kobi Liderman , 

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.

Mordka passed away on July 26 1937.

Chil Halpern

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. While waiting to enter Israel, their first child Dvora was born. Later they arrived to Israel to start their new life in 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.