Looking for Weldhagen Struwig Predecessors IN Sa

I would appreciate any information on my predecessors to determine our ancestry:

Father: Stephanus Venter Weldhagen (Fanie)
Mother: Gerbreg Elizabeth Weldhagen(Maiden -Struwig)
Their Children: Lizette, Anita (Married- Swarts), Fanus (Stephanus Venter)-Me

Known Ancestry:

Father's Side:
My Grandfather: Johannes Christiaan Frederick Weldhagen (Attie)
My Grandmother: Hester Anna Ignasina (Maiden Venter) (Hettie)
Their Children: Buksie(??)(married van Heerden), Boebie (Willem??), Hannes(Johannes Christiaan Frederik)& Fanie (Stehpanus Venter)

Mother's Side:
My Grandfather: Danie (Daniel) Struwig
My Grandmother: Gerbreg Elizabeth (Maiden Venter)
Their Children: Charlene, Apie (Abraham Jacobus),Godfried(Godfried, Drodtskie),Danie(Daniel),Basie(Johannes Jakobus),Betsie(Gerbreg Elizabeth), & Sakkie (Sarel Jacob).