 Hendricus Petrus "Piet" Dijkgraaf, son of Leonardus Johannes Dijkgraaf and Anna Maria Elizabeth Arends.Born 13 Jan 1892 Delft, died 20 Jun 1970 's-Gravenhage, 78 years. Occupation: sigarenwinkelier Married 15 Nov 1922 Schiedam (47 years married) to:  Cornelia Maria de Raaij, daughter of Bernardus de Raaij and Catharina Petronella Stroijckens.Born 11 Jan 1893 Schiedam, died 02 Feb 1970 's-Gravenhage, 77 years | |||