Geertruyda Margaretha was die dogter van Johannes Petrus Diederik van der Westhuizen en Maria Elizabeth Maree.
Haar naam kom nie voor in hulle pa se sterfkennis van 1893 nie:
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)
