Jacob Aandagt was a son of Isaac Aandagt and Aaltje Kool. Because his parents were divorced in 1934, Jacob Aandagt stayed in the Bergstichting since 1937.
Jacob had five other siblings: Elias, Rebecca, Joseph, Elisabeth and Asser. Beside them he had two half-sisters 541892 en 568686.
City Archive of Amsterdam, archive card of Jacob Aandagt and Isaac Aandagt.