Klaas Keijzer, born in Groningen on February 16, 1933 ,
(son of Reintje Keijzer and Antje de Vries),
married in Groningen on September 3, 1957 to
Trientje Horst, born in Groningen on May 8, 1933, died there on January 31, 2003,
(daughter of Folkert Horst and Aukje Bos).