 Petrus "Piet" Dijkgraaf, son of Cornelis "Cor" Dijkgraaf and Catharina van der Elsen.Born 03 Nov 1911 Brielle, died 18 Mar 1988 's-Gravenhage, age 76 years. Occupation: controleur 1e klas Raad van Arbeid Married 27 Jul 1938 Rotterdam, age 26 years (married 49 years) to:  Helena Pieternella "Lenie" Brouwer, age by marriage 25 years, daughter of Pieter Johannes Brouwer and Helena Stolk.Born 24 Nov 1912 's-Gravenhage, died 16 Sep 1999 's-Gravenhage, age 86 years, cremation 21 Sep 1999 's-Gravenhage (Loosduinen), crematorium "Ockenburgh" Children: | |||