First two given names from birth search of daughter on New Zealand BDM website in January 2019:
1893/11986. Mawson, May Ethel Garfield. Mother: Mary Ann. Father: Joseph

Maiden name, year and country of marriage from search on New Zealand BDM website in January 2019:
1888/1664. Bride: Mary Ann Holland. Groom: Joseph Mawson

Full date of marriage of 8 June 1888 from further searching in January 2019 on BDM Search by incrementally changing the date range for the marriage.