The chief reason why the TDSB wishes to quit using the word "chief" (derived from the French "chef", possibly the Latin "caput" and in everyday use since the 16th century) when referring to leadership positions is because in some contexts the word has a pejorative meaning. For example; "Too many chiefs and not enough Indians" or the names of various sports teams, etc. There are several words for leaders  in the various Indigenous languages like "sagamore" or "sachem", but even these have been somewhat Anglicize by translation. It would be a compliment to Indigenous people if Canadians called the Fire Chief the Fire Sachem, but that would be up to the people who used the term, not politicians.