Ncube, Mncube, Khambule, Mlotshwa, Mzilankatha, Ngcamu, Mpangazitha, Zikhali, Makalima
All these surnames are actually Mncube/Ncube surnames but people opted to use toetems and grandparents names as surnames. I think you should look at the origins of the surname Ncube before assuming that it is a Kalanga surname. In actual fact these people are Sotho descendants and not Nguni. Research on the above surnames and you will discover that its actually one and the same surname with one toetem for all of them.
I do not dispute the fact that The Ncube surname has been used by the Kalanga and shona tribes (Malaba, Shoko etc), but these Ncubes are totally different from the Mzilankathas and are not Sotho descendants.
See below the history and origins of the above mentioned surnames and how they relate:
ABANTU BASEMANCUBENI Abantu basemaNcubeni ungababiza Mncube,Ncube noma Ke Sincuba iqiniso kusengabantu ababodwa laba. Labantu badabuka eLusuthu esizweni lesi sabeSuthu okungakuthi nabo bangabeSuthu.Sibathola bona sebezinze laphaya entabeni Intabazwe (Harriesmith) nasOndini(Underburg), Umuntu esiqala ukuzwa ngaye kulababantu nguye uMncube uqobo. Yenawazala uMzilankatha owazala uMlotshwa yena wazala uSiyobi owazala uMadlozi.Bafike kuleli lakwaZulu lisengalakwaMthethwa lonke leliyazwe elingaphesheya kwemfolozingaselwandle.
Abantu bakwaKhambule baphuma kwaNcube.
Eqinisweni uKhambule bekuyithakazelo be kuthi uNcube kube isibongo. Kodwa uzalo
lukaKhambule owabe engumnawabo kaMadlozi bezalwa naye nguSiyobi
kaMthombeni kaMlotshwa kaMzilankatha
kaNcube lona lwanquma ukusenzisa igama lakhe njengesibongo. Kwase kuba ukuvela
kwesibongo sakwaKhambule. UKhambule lona ngenkathi inkosana yakwabo okwabe
kunguMadlozi isithuthele kwaZulu lapho yase izitholele khona izwe esizweni
sakwaMthethwa yena wavele wacela uyise ukuba amabele ifa okungelakhe.
