Harry was the son of Ariah Lieb (or Aaron Louis) Dolgopyat and Brina (or Bertha) Tabatchnick, and had at least two sisters, Mindel who was born around 1879 and Esther who was born about 1887 along with a brother Phillip.
|Passenger List of Mauretania|
Brina died under the name Bertha Dolgin in Malden Massachusetts on 26th May 1912. She was listed on her death certificate as a widow of Aaron Dolgin. Her parents were listed as Dora and Solomon Tabatchnick, both born in Russia.