 Pieter "Piet" Dijkgraaf, son of Johannes "Johan" Dijkgraaf and Alberta Theodora "Betsy" van de Donk.Born 07 Apr 1950 Winterswijk, died 27 Mar 2011 Winterswijk, 60 years, buried 01 Apr 2011. Occupation: rijksambtenaar Married to:  Name Withheld, daughter of Name Withheld and Maria Gezina Geertruida "Marie" Beijerink. PRIVACY FILTERChildren: | |||