Mangosuthu Butheleziâs role is not legal, says Zulu queen and princesses Share Durban - As warring Zulu royal factions get ready for oral arguments in court, Queen Sibongile Dlamini-Zulu has fired a salvo at Inkosi Mangosuthu Buthelezi, the traditional prime minister of the monarch and Zulu nation, stating that he is a mere nephew of the royals and, as such, he has no right to convene royal meetings. This is contained in a 34-page affidavit filed by Dlamini-Zulu in response to Buthelezi before the Pietermaritzburg high court where the queen is fighting to inherit 50% of the estate of the late King Goodwill Zwelithini on the basis that, as his first wife, they were married in community of property and in a civil rites marriage.