Izaäk Speijer was a son of Elkan Aron Speijer and Saartje de Vries.
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On Saturday 11 April 1942 at 7 o'clock pm, ten Jewish residents of Leeuwarden were arrested in revenge for the removal of the plaque 'Forbidden for Jews' that had been fixed to a bench in the Vossepark. They were transferred to Amersfoort camp. Izaäk Speijer was among them. He lived at 58 Vred…