┌── Jan Willems van Lang (Oudeschans, Bellingwolde, Groningen, Nederland;08 January 1817 - 23 August 1858)

Jan van Lang (31 August 1841 Oudeschans, Bellingwolde, Groningen, Nederland - 29 August 1910 Midwolda, Groningen, Nederland)

   │           ┌── Harm Jans Houwen (Date unknown - Date unknown)

   │     ┌── Jan Harms Houwen (25 November 1788 Beerta, Groningen, Nederland - 24 September 1842 Finsterwolde, Groningen, Nederland)

   │     │     └── Gepke Jans (Date unknown - Date unknown)

   └── Gepke Jans Houwen (01 February 1816 Midwolda, Groningen, Nederland - 12 April 1891 Oostwold, Midwolda, Groningen, Nederland)

         │     ┌── Berent Elses Kroeze (Oostwold, Midwolda, Groningen, Nederland;15 December 1766 - 15 November 1836)

         └── Foktje Berends Kruize (04 April 1792 Oostwold, Midwolda, Groningen, Nederland - Date unknown)

               └── Taatje Temmens(Approximately 1764 Oostwold, Midwolda, Groningen, Nederland - 05 July 1844 Bellingwolde, Groningen,
                   Nederland)