What is "ndlovukati"

Ndlovukati (literally, "She-Elephant", pl. tiNdlovukati) is the Swazi title for the female head of state of Swaziland and is roughly equivalent to a Queen Mother or Senior Queen in other countries. The title is given preferentially to the mother of the reigning King (styled the Ngwenyama, "Lion of Swaziland"), or to another female royal of high status if the King's mother has died. Indlovukati rules alongside the Ngwenyama, and when there is no King, she rules as a Queen Regent. The current Ndlovukati is Queen Ntombi Tfwala, the mother of Ngwenyama Mswati III and wife of Sobhuza II. She has also been Queen Regent from 1983 until 1986 when Mswati became King. The most notable Queen Regent was Ndlovukati Labotsibeni Mdluli who ruled Swaziland from 1899 until 1921 when she abdicated for Sobhuza II.