Izaäk van Hessen was a son of Bernard van Hessen and Frouwke van Dam. He married in Amsterdam on 25 February 1909 to Sarline Diamant, daughter of Eliazer Diamant and Vrouwtje de Paauw.
City Archive of Amsterdam, archive card of Izaak van Hessen, an adition of a visitor of the website and website www.wiewaswie.nl.
Two other children, who had left the family home, survived the war.
Addition of a visitor of the website