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

               ┌── Nathan Jacob Abas (Amsterdam, Noord-Holland, Nederland;Thursday 12 January 1843 - Thursday 08 October 1914)

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

         ┌── Salomon Jacob Abas (Amsterdam, Noord-Holland, Nederland;Monday 19 April 1875 - Thursday 01 June 1939)

         │     └── Dina van Beek (Amsterdam, Noord-Holland, Nederland;Tuesday 11 April 1843 - Tuesday 25 June 1929)

   ┌── Nathan Abas (Sunday 01 May 1904 Amsterdam, Noord-Holland, Nederland - 1945 Sobibór, Polska)

   │     └── Clara Coppenhagen (Friday 25 August 1876 Amsterdam, Noord-Holland, Nederland - Friday 23 April 1943 Sobibór, Polska)

Rita Abas (Rotterdam, Zuid-Holland, Nederland;1931 - 1936)

   └── Gerdina Hendrina van Doorn (Wednesday 10 June 1903 Haarlem, Noord-Holland, Nederland - Date unknown)