Jetje Groen, daughter of Jacob Raphaël Groen and Branca van Lochem, was 11 years old when she has been taken to Westerbork on 28 October 1943. Based on this date may be assumed that Jetje Groen had gone into hiding and on the archive card of the City Archive of Amsterdam is mentioned with the date of 4 December 1942: V.O.W. – Vertrokken Onbekend Waarheen (translated: Left, Unkown Whereto). She was…