When Johanna Petronella Catharina Tops was born on 1 March 1946, her father, Antonius Tops, was 28 and her mother, Antoinetta Theodora Maria Wijman, was 23. She married Theodorus Josephus Maria Houkes on 13 December 1966, in Eindhoven, North Brabant, Netherlands. They were the parents of at least 1 daughter. She died on 29 September 2015, at the age of 69.