Jan Sarel Marthinus Venter

Good day. I am looking for information on Jan Sarel Marthinus Venter. I don't know when he was born. He died in 1953.His wife's name was Susanna Catharina Petronella Venter. They had 8 children. My father was Andries Petrus Jacobus Venter born on 11 October 1929.My mother's name was Elizabeth Catarina Venter (van Niekerk). She was born on 7 February 1930
They were married on 4 August 1951.
The other children of my grandfather was Piet, Jan, Daniel Jacobus, Susanna Catharina Petronella Venter, Maria Johanna Venter, Hermanus Venter. If any one can assist me with information, please.

Regards,
Alida de Kock