土司

sliced bread (loanword from "toast") / government-appointed hereditary tribal headman in the Yuan, Ming and Qing dynasties

surname Si

to take charge of / to manage / department (under a ministry)

Tu (ethnic group) / surname Tu

earth / dust / clay / local / indigenous / crude opium / unsophisticated / one of the eight categories of ancient musical instruments 八音[ba1 yin1]