Zindzi Mandela, daughter of South Africa's former President, Nelson Mandela, and Winnie Madikizela-Mandela, has died, a report in which BBC quoted SABC has said. She died in Johannesburg on Monday morning aged 59. The death has been confirmed by a family source. Zindzi was South Africa's ambassador to Denmark at the time of her death. The cause of her death was not immediately revealed. "The 59-year-old daughter of former President Nelson Mandela and struggle stalwart Winnie Madikizela-Mandela, passed away at a Johannesburg hospital in the early hours of this morning," said SABC. She was Mandela's sixth child and his second with Winnie Madikizela-Mandela.