| Descendancy Chart: | 
 - Pedigree Tree 
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 Family with spouse
 Geertje Clobus
 Geuchien Blaak
 Zwaantje Blaak
 Johannes Blaak
 Poppo Blaak
 Lambertus Blaak- Poppo Blaak  (I02090) Birth 2 April 1879 -- Papendrecht, Papendrecht, Zuid-Holland, Netherlands (I02090) Birth 2 April 1879 -- Papendrecht, Papendrecht, Zuid-Holland, Netherlands
 Death 12 November 1956 (Age 77) -- Groningen, Groningen, Groningen, Netherlands
  
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  Marriage  18 March 1907   -- Wildervank, Veendam, Groningen, Netherlands Marriage  18 March 1907   -- Wildervank, Veendam, Groningen, Netherlands
 - Pedigree Tree 
 Descendancy Chart
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 Family with spouse
 Poppo Blaak
 Geuchien Blaak
 Zwaantje Blaak
 Johannes Blaak
 Poppo Blaak
 Lambertus Blaak- Geertje Clobus  (I02091) Birth 31 January 1880 -- Zuidlaren, Tynaarlo, Drenthe, Netherlands (I02091) Birth 31 January 1880 -- Zuidlaren, Tynaarlo, Drenthe, Netherlands
 Death 23 June 1951 (Age 71) -- Groningen, Groningen, Groningen, Netherlands
 
 - Number of Children: 5 
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 Family with spouse
 Jantina Maria Vos
 - Geuchien Blaak  (I26817) Birth 17 August 1907 -- Farmsum, Delfzijl, Groningen, Netherlands (I26817) Birth 17 August 1907 -- Farmsum, Delfzijl, Groningen, Netherlands
 Death 27 January 1980 (Age 72)
  
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  Marriage  26 November 1934   -- Bedum, Bedum, Groningen, Netherlands Marriage  26 November 1934   -- Bedum, Bedum, Groningen, Netherlands
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 Family with spouse
 Geuchien Blaak
 - Jantina Maria Vos  (I26818) Birth 12 December 1913 -- Groningen, Groningen, Groningen, Netherlands (I26818) Birth 12 December 1913 -- Groningen, Groningen, Groningen, Netherlands
 Death 27 November 1976 (Age 62)
 
 - Unknown children 
 
 - Zwaantje Blaak  (I02092) Birth 1909 (I02092) Birth 1909
 Death 16 February 1910 (Age approx. 1 year) -- Utingeradeel, Friesland, Netherlands
  
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 - Johannes Blaak  (I26816) Birth 8 July 1910 -- Farmsum, Delfzijl, Groningen, Netherlands (I26816) Birth 8 July 1910 -- Farmsum, Delfzijl, Groningen, Netherlands
  
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 Family with spouse
 Catharina Luitjes
 Trientje Fennie Blaak
 Geertje Goeree Blaak- Poppo Blaak  (I04728) Birth 28 June 1914 -- Rotterdam, Rotterdam, Zuid-Holland, Netherlands (I04728) Birth 28 June 1914 -- Rotterdam, Rotterdam, Zuid-Holland, Netherlands
 Death 8 February 1997 (Age 82) -- Groningen, Grongingen, Groningen, Netherlands
  
 1 . 4
  Marriage  15 October 1942   -- Groningen, Groningen, Groningen, Netherlands Marriage  15 October 1942   -- Groningen, Groningen, Groningen, Netherlands
 - Pedigree Tree 
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 Family with spouse
 Poppo Blaak
 Trientje Fennie Blaak
 Geertje Goeree Blaak- Catharina Luitjes  (I04729) Birth 14 October 1912 -- Groningen, Groningen, Groningen, Netherlands (I04729) Birth 14 October 1912 -- Groningen, Groningen, Groningen, Netherlands
 Death 18 March 1991 (Age 78) -- Groningen, Grongingen, Groningen, Netherlands
 
 - Number of Children: 2 
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 Adriaan Jan Grondel
 - Trientje Fennie Blaak  (I16857) Birth 28 June 1945 -- Groningen, Groningen, Groningen, Netherlands (I16857) Birth 28 June 1945 -- Groningen, Groningen, Groningen, Netherlands
 Death 28 March 2014 (Age 68) -- Lelystad, Lelystad, Flevoland, Netherlands
  
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   - Pedigree Tree 
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 Trientje Fennie Blaak
 - Adriaan Jan Grondel  (I27502) Birth 28 March 1931 (I27502) Birth 28 March 1931
 Death 24 June 1991 (Age 60) -- Groningen, Groningen, Groningen, Netherlands
 
 - Unknown children 
 
  
 1 . 4 . 2
  Private Private
 
 - Lambertus Blaak  (I02093) Birth 1915 -- Groningen, Groningen, Groningen, Netherlands (I02093) Birth 1915 -- Groningen, Groningen, Groningen, Netherlands
 Death 9 November 1918 (Age 3) -- Bemmel, Lingewaard, Gelderland, Netherlands
  
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