Voortrekker Birth: http://www.familysearch.org/eng/search/frameset_search.asp?PAGE=/eng/search/ancestorsearchresults.asp On baptismal register they are Martins. Her DN states that there are no chidren. In her will everything is left to her niece and daughters e-enforcing the story that her "niece" is actaually her daughter adopted by Jacobus Joshua Martens and Elizabeth Catharina Jacoba Maria Martens
Voortrekker Baptisms Transcript. Kinderen door Ds. Daniel Lindley te Pietermaritzburg gedoopt, entry number 37. Repository: National Archives Repository, Pretoria., FK 2290, which is a transcript of a number of the early baptismal register now in churches in the Free State and the Transvaal..