| Family Tree Collection | Main index A-Z | Total index | Names | Index places | Hakker | 
| Family page | 
| Jacob Benjamin de Groot
 to: Fijtje Sanders | 
| 1) Sander Jacob de Groot, birth 23 Mar 1875 Den Haag, died 9 Nov 1941 Den Haag, buried Wassenaar (field H row 13 nr. 26), occupation: merchant of drapery Married 23 Feb 1902 Den Haag to: Naatje Barend Hakker, birth 23 Jan 1880 Den Haag, died 5 Mar 1943 Sobibor living Den Haag, daughter of Barend Jacob Hakker and Betje Moses Keijl | 
| Family page | 
| Jacob Benjamin de Groot
 to: Saartje Sanders | 
| 1) Aaron Jacob de Groot, birth 25 May 1871 Den Haag, died 5 Mar 1943 Sobibor living Den Haag, occupation: shoemaker, dealer Married 24 Aug 1898 Den Haag to: Sara Salomon Hakker, birth 11 Mar 1869 Den Haag, died 5 Mar 1943 Sobibor living Den Haag, daughter of Salomon Jacob (Pinchas) Hakker and Rachel Samuel van der Kloot |