+ | 1 . I350770 Frederik Koolhof b. Abt 1883, Bellingwolde, Groningen, Nederland  d. Yes, date unknown | > | 2 . I350748 Geeske Koolhof b. Abt 1885, Bellingwolde, Groningen, Nederland  d. Yes, date unknown | | 3 . I350782 Reinder Koolhof b. Abt 1887, Bellingwolde, Groningen, Nederland  d. 06 Mar 1945, Bellingwolde, Groningen, Nederland (Age 58 years) | | 4 . I350710 NN Koolhof b. 02 Jul 1889, Bellingwolde, Groningen, Nederland  d. 02 Jul 1889, Bellingwolde, Groningen, Nederland (Age 0 years) | + | 5 . I350644 Harm Koolhof b. 30 Dec 1890, Bellingwolde, Groningen, Nederland  d. Yes, date unknown | > | 6 . I350753 Fokko Koolhof b. Abt 1893, Bellingwolde, Groningen, Nederland  d. Yes, date unknown | + | 7 . I350757 Eiko Koolhof b. 23 Dec 1894, Bellingwolde, Groningen, Nederland  d. 28 Jun 1959, Groningen, Groningen, Nederland (Age 64 years) | + | 8 . I350768 Teelko Koolhof b. 15 Aug 1897, Bellingwolde, Groningen, Nederland  d. Yes, date unknown | > | 9 . I350765 Albert Jan Koolhof b. Abt 1900, Bellingwolde, Groningen, Nederland  d. Yes, date unknown | |