│          ├─ Jantje Fokkes Vrij

(01 Aug 1804 Wymeer, Ostfriesland, Niedersachsen, Deutschland -
         │          │ 06 Jul 1885 Bellingwolde, Groningen, Nederland)
         │          │          │ +
Derk IJzer

(15 Mar 1825 Bellingwolde, Groningen, Nederland - 08 Aug 1864 Bellingwolde, Groningen, Nederland)
         │          │          │ +
Jan Kemper

(1830 Bellingwolde, Groningen, Nederland - Yes, date unknown)
         │          │          │ +
Gerhardus Frans

(01 Apr 1840 Oude Pekela, Groningen, Nederland - Yes, date unknown)
         │          │          │ +
Reinder Hendriks Jager

(31 May 1815 Nieuwolda, Groningen, Nederland - 28 Oct 1889 Groningen, Groningen, Nederland)
         │          │          │ +
Maria Bunk

(Cal 1843 Bellingwolde, Groningen, Nederland - Yes, date unknown)
         │          │          │ +
Derkje Ottens

(Cal 1845 Blijham, Wedde, Groningen, Nederland - Yes, date unknown)
         │          │           +
Wubbiena Bos

(1840 Beerta, Groningen, Nederland - Yes, date unknown)
         │          │           +
Trientje Korvemaker

(19 Mar 1841 Blijham, Wedde, Groningen, Nederland -
         │          │           : 26 May 1910 Blijham, Wedde, Groningen, Nederland)
         │          │           +
Grietje Drenth

(20 Dec 1855 Finsterwolde, Groningen, Nederland -
         │          │           25 Aug 1929 Beerta, Groningen, Nederland)
         │          └─ Richert Vrij Fokken

(18 Jan 1807 Wymeer, Ostfriesland, Niedersachsen, Deutschland -
         │           27 Sep 1865 Wymeer, Ostfriesland, Niedersachsen, Deutschland)
         │                    │ +
Casper Gosling

(Yes, date unknown - Yes, date unknown)
         │                    │ +
Geertje de Boer

(21 Nov 1831 Stapelmoor, Ostfriesland, Niedersachsen, Deutschland - Yes, date unknown)
         │                    │ +
Taalke Santjer

(Yes, date unknown - Yes, date unknown)
         │                    │ +
Christina Harmina Schmertman

(Yes, date unknown - Yes, date unknown)
         │                    ├─ Jan Richerts Freij

(25 Aug 1842 Heerenland, Bunde, Ostfriesland, Niedersachsen, Deutschland -
         │                    │ 04 Aug 1927 Oudedijk, Beerta, Groningen, Nederland)
=>
         │                    │ +
Marike Everts Pieters

(13 Feb 1846 Bellingwolde, Groningen, Nederland -
         │                    │ 12 Sep 1927 Oudedijk, Beerta, Groningen, Nederland)
         │                    │ +
Martje de Vries

(Yes, date unknown - Yes, date unknown)
         │                    ├─ Gepke Freij

(09 Jan 1848 Heerenland, Bunde, Ostfriesland, Niedersachsen, Deutschland -
         │                    │ 02 Aug 1889 Bellingwolde, Groningen, Nederland)
=>
         │                    │ +
Hinderk Troff

(Yes, date unknown - Yes, date unknown)
         │                    │ +
Tebbo Menken

(31 May 1854 Beerta, Groningen, Nederland - Yes, date unknown)