| Descendancy Chart: | 
 - Pedigree Tree 
 Descendancy Chart
 Ancestry Chart
 Compact Chart
 Circle Diagram
 Hourglass Chart
 Family with spouse
 Harmannus Kostwinder
 - Grietje Derks  (I21753) Birth 12 July 1905 -- Nieuwe Pekela, Pekela, Groningen, Netherlands (I21753) Birth 12 July 1905 -- Nieuwe Pekela, Pekela, Groningen, Netherlands
 
 1
  Marriage  7 August 1926   -- Oude Pekela, Pekela, Groningen, Netherlands Marriage  7 August 1926   -- Oude Pekela, Pekela, Groningen, Netherlands
 - Pedigree Tree 
 Descendancy Chart
 Ancestry Chart
 Compact Chart
 Circle Diagram
 Hourglass Chart
 Family with spouse
 Grietje Derks
 - Harmannus Kostwinder  (I21751) Birth 5 May 1905 -- Veendam, Veendam, Groningen, Netherlands (I21751) Birth 5 May 1905 -- Veendam, Veendam, Groningen, Netherlands
 Death 30 July 1942 (Age 37) -- Veendam, Veendam, Groningen, Netherlands
  
 - Unknown children 
 

 
	


























