Helena Duitz was married to Marcus Salomon van Praagh. He had been previously married to her sister Doortje. He passed away in 1929. She had a son Salomon and a daughter Henriëtte Sophie. The here mentioned Rosa is a daughter from the first marriage of her husband. She also had a stepson Emile.
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In addition, a Jokos file (number 7979) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 9712/16125).