Cornelia Margaretha Maria Van Aardt 's(born Erasmus on 13 Jyly 1909)) parents is Johannes Jacobus Erasmus (15 July 1885 -
15 October 1918 Bloemfontein) and Maria Johanna Erasmus (born Van Den Berg) (4 June 1888 - 16 October 1918 Bloemfontein). Her brother is Christiaan Petrus Erasmus (6 February 1911 - 15 June 1968). The father of Johannes Jacobus Erasmus is Christiaan Petrus Erasmus (b 26 November 1860 and d 7 Augustus 1917 in Pietermaritzburg) and Hendrina Johanna ERasmus (born Van der Merwe on 14 March 1863 and d 3 November 1901 in British Concentration Camp in Bethulie, Orange Freestate).