First given name from birth search for daughter on New Zealand BDM website in July 2021:
1860/7383. McKenzie, Harriett. Mother: Isabella. Father: Duncan

Maiden name, year and country of marriage from search on New Zealand BDM website in July 2021:
1856/2032. Bride: Isabella Christie. Groom: Duncan McKenzie

Full date of marriage of 12 July 1856 from further searching in July 2021 on BDM Search by incrementally changing the date range for the marriage.