Complex sentence: They had a high status and ceremonies were held at grave sites to honour these white women: white not as in the colour of their clothes but meaning "wijsheid" (wisdom), these honouring among the graves of the dead.
Split into simpler sentences: They had a high status and ceremonies were held at grave sites to honour these white women. They were called white not as in the colour of their clothes but meaning "wijsheid" (wisdom), these honouring among the graves of the dead.