Dame Catherine Anne Tizard ( née Maclean , born 4 April 1931 ) was Mayor of Auckland City and the 16th Governor-General of New Zealand , the first woman to hold either office .
Dame Catherine Anne Tizard ( née Maclean ; born 4 April 1931 ) is New Zealand politician . She served as the Mayor of Auckland City and the 16th Governor-General of New Zealand .