 Johannes Dijkgraaf, son of Hendrik Besman "Hendrik" Dijkgraaf and Helena "Leentje" van Zwieten.Born 02 Mar 1912 Rotterdam, died 13 Feb 1968 Rotterdam, age 55 years. Occupation: groentenventer/groentenhandelaar Married 02 Jul 1958 Rotterdam, age 46 years (married 9 years) to:  Magthilda Visser, age by marriage 44 years, daughter of Teunis Visser and Magthilda Lagendijk.Born 28 Nov 1913 Rotterdam, died 14 Feb 1995 Rotterdam, age 81 years | |||