Joe's brother Herszl stayed back with his family. Herszl died in 1922 at 1938, leaving behind his wife and three kids. 

His son Nachman tells a very sad but interesting story about his and his families experiences during the Holocaust. I will link the interview down below.

He lost his sister, Chaja Wasserman and her young baby daughter.

Herzl Elencwajg, circa 1910

Interview in 2006.