Hijman van Praag was a son of Gerrit van Praag and Esther Oudkerk, a family with six children of which his sister Dina and his brother Meijer also have died in the Holocaust. Hijman married in Den Helder on 19 April 1910 to Elsje Oudkerk, daughter of Emanuel Oudkerk and Jogeva Sloog. The couple had three children: Gerrit, Jogeva and Emanuel.
City Archive of Amsterdam, archive cards of Hijman van Praag and Elsje Oudkerk.
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