Isaak de Groot, born 1902 in Delft as son of Abraham de Groot and Jetje Alter, married Emmy Sigrid Alida Winther 23 December 1930 in Antwerp, a daughter of the Danish Christian Valdemar Winther and Alida Vreeland from Amsterdam. Isaak was employed as trade representative for the Antwerp Company Rouxe, established at Delinstraat 14 in Antwep and earns a weekly salary of Brfs. 360.--. Afther te wedd…