Given name from birth search of son on New Zealand BDM website in November 2018:
1894/651. Harris, George Gregory. Mother: Jane. Father: Alfred George

Maiden name, year and country of marriage from search on New Zealand BDM website in November 2018:
1885/1170. Bride: Jane Pender. Groom: Alfred George Harris

Full date of marriage of 25 May 1885 from further searching in November 2018 on BDM Search by incrementally changing the date range for the marriage.