My grandfather, Philippus Christoffel SNYMAN, was born on 15 January 1931 in Oudtshoorn, Western Cape, South Africa. He died on 17 September 2002, aged 71, in Oudtshoorn, Western Cape, South Africa. His mother was Jacomina Francina. Her "last name at birth" is unknown. She remarried once to Rynier Stefanus Lombard. Jacomina was born on 26 June 1906, place unknown. She died on 4 October 1976.

Please help me find out who my great grandfather was and Jacomina's maternal surname.