I am trying to find out any information I can about Johaan Niklaas DREYER who married Anna Susanna Katharine PRETORIUS. They were possibly married at the beginning of the 1900's. They had 4 children Martha Sophia, Gertrude Petronella, Luwies and Susanna. On my grandmother Martha's birth cert it says she was born in 1905 Spitzkoppen in Grootfontein 'in the house of the Damara & Namaqua Cooperation.'