His marriage record has his first name spelled Lawrence, middle name is Jacobus, last name Jonck.
Marriage 14 Jul 1932 at Ladysmith, Natal , South Africa
Age is 23, spouse is Magdalena Jacoba Joubert, and her age is 21.
"South Africa, Natal Province, Civil Marriages, 1845-1955,"
National Archives and Records Service of South Africa, Pretoria; 1,938,467.