I've just finished researching the matrilineal line of Walter Joseph Jones.
His line to Geertruij Helm, SM/PROG is as follows:
11. Geertruijdt Siek
10. Anna Margaretha Gildenhuisz, SM
8. Anna Margaretha Smuts, b3c2d1
7. Magdalena Petronella Odendaal, b3c1d5
6. Cornelia Gertruida de Jager
5. Magdalena Elizabeth Petronella Pretorius
This means we now have 4 confirmed h1ak1 for FOUR of Geertruij Willemsz daughters and one confirmed H.