| Isaac Moses Willing Slap (1852 - 1919) |
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| Rachel Aaron Sturk Waas (1854 - 1932) |
| Amraham Smeer | Jansje Waas Slap |
| b. 7 Oct 1875, Amsterdam, Nord-Holland, Netherlands d. 7 May 1943, Sobibor Death Camp, Biala Podleska, Poland. bur. occ. edu. rel. |
b. 11 Jan 1879, Amsterdam, Nord-Holland, Netherlands d. 14 Sep 1942, Auschwitz-Birkenau (Oswiecim) Camp, Katowice, Poland. bur. occ. edu. rel. |
| Spouses: 1, 2 |