FW De Klerk married twice. Before marrying Elita Georgiadis, his ex-wife’s name is Marike Willemse. They lived together for more than four decades. His ex-wife was the first lady of South Africa, and a renowned female politician served as a governor National Party. 

As per her Wikipedia page, Marike was murdered at her Dolphin Beach apartment in Blouberg, Cape Town, on December 3, 2001. 

De Klerk and Marike are separated before her death. They filed and legally split in 1996. 

Afterward, Just after his divorce, he exchanged the vows with his current wife, now widow, Elita Georgiadis, in 1999. 

As per the source, FW De Klerk was a supportive father, husband, and caring grandparents. 

He has three children with his ex-wife Marike. Their names are Susan, a teacher, Jan, a farmer in Western Transvaal, and Willem, a public relations.