Can anyone help?

I am Beatrice Sibongile Mabanga born in 1975 as the first Daughter of the Late Zakhele Cyprian Mabanga and Fuzile Aminah Mabanga ,the couple was married in 1974 in Bethal. iam looking for the origin of Mabanga family in South Africa, iam doing this because we are now two sisters left without a brother to do this for our family,our late brother left  a baby boy so our kids have to know where we are coming from and so that we can know who we are? Beatrice S Mabanga [mabangabs@mpg.gov.za]