┌── 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)
│ ┌── Jan Harms Houwen (25 November 1788 Beerta, Groningen, Nederland - 24 September 1842 Finsterwolde, Groningen, Nederland)
└── 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)
└── Taatje Temmens(Approximately 1764 Oostwold, Midwolda, Groningen, Nederland - 05 July 1844 Bellingwolde, Groningen,
  Nederland)
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