┌── Nathan Salomon Pinchas Abas (Amsterdam, Noord-Holland, Nederland;1770 - Monday 19 May 1823) =>

               ┌── Jacob Nathan Abas (Amsterdam, Noord-Holland, Nederland;Saturday 02 July 1803 - Wednesday 23 October 1867)

               │     └── Schoontje Mozes Swijts (Amsterdam, Noord-Holland, Nederland;1774 - Sunday 09 July 1820) =>

         ┌── Joseph Abas (Thursday 01 August 1850 Amsterdam, Noord-Holland, Nederland - Date unknown)

         │     │     ┌── Abraham Isaac van Abbe (Amsterdam, Noord-Holland, Nederland;1776 - Monday 20 March 1843) =>

         │     └── Rachel Abraham van Abbe (Amsterdam, Noord-Holland, Nederland;1813 - 1867)

         │           └── Rebecca Marcus Krost (1777 Amsterdam, Noord-Holland, Nederland - Date unknown)

   ┌── Jacob Abas (Monday 15 May 1876 Amsterdam, Noord-Holland, Nederland - Monday 01 April 1918 Poortugaal, Zuid-Holland, Nederland)

   │     │           ┌── Mozes Jesajas de Vries (1775 - Date unknown) =>

   │     │     ┌── Mozes Jesajas de Vries (Saturday 03 February 1816 Kuinre, Overijssel, Nederland - Date unknown)

   │     │     │     └── Judik Mozes Bloy (1784 - Date unknown)

   │     └── Judikje de Vries(Tuesday 15 October 1844 Kuinre, Overijssel, Nederland - Monday 08 November 1926 Rotterdam, Zuid-Holland,
   │          Nederland)

   │           └── Hendrika de Vries (Friday 27 September 1822 Harlingen, Friesland, Nederland - Date unknown)

Isaac Abas (Sunday 21 September 1913 Rotterdam, Zuid-Holland, Nederland - Friday 23 July 1943 Sobibór, Polska)

   │                 ┌── Mozes Jesajas de Vries (1775 - Date unknown) =>

   │           ┌── Mozes Jesajas de Vries (Saturday 03 February 1816 Kuinre, Overijssel, Nederland - Date unknown)

   │           │     └── Judik Mozes Bloy (1784 - Date unknown)

   │     ┌── Benjamin de Vries (Wednesday 17 June 1846 Kuinre, Overijssel, Nederland - Date unknown)

   │     │     └── Hendrika de Vries (Friday 27 September 1822 Harlingen, Friesland, Nederland - Date unknown)

   └── Henderika de Vries(Sunday 15 March 1874 Terband, Ængwirden, Friesland, Nederland - Thursday 15 October 1942 Auschwitz-
       Birkenau, Polska)

         │     ┌── Isaak Moses Veltman (Date unknown - Date unknown)

         └── Elisabeth Veltman (Tuesday 09 October 1849 Heerenveen, Schoterland, Friesland, Nederland - Date unknown)

               └── Sara van Gelderen (Date unknown - Date unknown)