 David Dijkgraaf, son of Maarten Dijkgraaf and Cornelia Potters.Born 07 Feb 1902 Rotterdam, died 17 Mar 1969 Rotterdam, 67 years. Occupation: kapitein/eigenaar van de sleepboot "Quarto"/kantoorbediende bij P. Smit Married 05 Aug 1925 Rotterdam (40 years married) to:  Wilhelmina "Mien" van Zonneveld, daughter of Bastiaan Bernardus Frederik van Zonneveld and Aletta Johanna Lupke.Born 26 Jan 1898 Rotterdam, died 17 Oct 1965 Rotterdam, 67 years Children: | |||