Susanna Johanna was die dogter van Johannes Petrus Diederik van der Westhuizen en Maria Elizabeth Maree.
Uit hulle pa se sterfkennis van 1893:
Names of Children of deceased, and whether majors or minors.
Johanna Jacomina (Major)
Burgert Daniel (Minor)
Susanna Helena (Minor)
Maria Elisabeth (Minor)
Pieter Jacobus Marthinus (Minor)
Magdalena Gesina (Minor)
Gesina Maria (Minor)
Johannes Petrus Diedrik (Minor)
Martha Maria Catharina (Minor)
