┌── Klaas Klaassens Bouman(1791 Euvelgunne, Noorddijk, Groningen, Nederland - Thursday 03 December 1874
                     │   Groningen, Groningen, Nederland) =>

               ┌── Tonnis Bouman (Groningen, Groningen, Nederland;Friday 21 December 1832 - Sunday 29 August 1915)

               │     └── Annegijn Geerts Nienhuis (Groningen, Groningen, Nederland;Sunday 05 August 1787 - Thursday 03 July 1851)

         ┌── Klaas Tonnis Bouman (Friday 22 February 1867 Groningen, Groningen, Nederland - Date unknown)

         │     └── Frederika van der Warf (Groningen, Groningen, Nederland;Monday 12 September 1836 - Tuesday 01 December 1914)

   ┌── Tonnis Bouman (Groningen, Groningen, Nederland;Wednesday 13 February 1901 - Tuesday 12 September 1972)

   │     │     ┌── Fedde Berg (Sappemeer, Groningen, Nederland;Wednesday 22 May 1822 - Sunday 26 May 1895)

   │     └── Grietje Berg (Wednesday 31 July 1867 Sappemeer, Groningen, Nederland - Date unknown)

   │           │     ┌── Kasper Kristiaans Bakker (Nieuwe Pekela, Groningen, Nederland;1789 - Saturday 21 July 1849) =>

   │           └── Geertje Kaspers Bakker(Wednesday 24 June 1829 Nieuwe Pekela, Groningen, Nederland - Thursday 20 October 1870
   │               Sappemeer, Groningen, Nederland)

   │                 └── Anna Jans Stel (1799 - Wednesday 03 September 1851 Nieuwe Pekela, Groningen, Nederland)

Wibbina Marie Bouman (Date unknown - Date unknown)

   │           ┌── Jan Elema (Date unknown - Date unknown)

   │     ┌── Roelf Tonnis Elema(Saturday 21 June 1879 Bierum, Groningen, Nederland - Sunday 28 January 1968 Schagen, Noord-Holland,
   │     │   Nederland)

   │     │     └── Wibbechien Toxopeus (Date unknown - Date unknown)

   └── Wibbina Marie Elema(Sunday 28 August 1910 Metslawier, Oostdongeradeel, Friesland, Nederland - Friday 02 May 1969 Groningen,
       Groningen, Nederland)

         └── Maria Helena Amalia Johanna van de Beek(Tuesday 02 December 1879 Groningen, Groningen, Nederland - Thursday 17 February
             1966 Schoorl, Bergen, Noord-Holland, Nederland)