Joseph de Rooij, a butcher by trade, was a son of Mozes de Rooij and Elizabeth Moscoviter. On 10 February1937 he married in Rotterdam Leentje Boeki, a daugther of Azor Boeki and Hendrika Kulman. In 1942, the couple had a son Mozes Henny.
Joseph de Rooij lived with his wife Leentje Boeki in April 1940 at Kruisstraat 61b in Rotterdam but on 22 November 1940 Joseph and his wife moved to the Nenijto-grounds, location nr. 65 from the community of Rotterdam, and stayed there until October 1941 when Joseph and his wife moved from there to Noorderkanaalweg C 8. There their son was born and lived there as a family until they were sent to Camp Westerbork in April 1943.
On 10 April 1943 The De Rooij family was registered in Camp Westerbork and stayed in barack 70. On 4 May Joseph, his wife Leentje and his son Mozes Henny deported to Sobibor, where they all have been killed immediately upon arrival there on 7 May 1943.
The 'Nederlandsche Nijverheidstentoonstelling 1928 (internationaal)' (a Dutch Industrial exhibition), abbreviated Nenijto, was the first industrial exhibition since the world exhibition in 1883 in Amsterdam. The grounds were provided for free by de municipality of Rotterdam to the organisation and was located in a part of the polder Blijdorp. (Source: http://appl.gemeentearchief.rotterdam.nl/Nenijto/Tekst/Frames/Frames%20inleiding/Frame%20inleiding.htm)
City Archive of Rotterdam, family registration card of Joseph de Rooij; website www.wiewaswie.nl and the file cabinet of the Jewish Council, cards of Joseph de Rooij, Leentje de Rooij-Boeki and Mozes Henny de Rooij.