First given name from search for children including daughter “Ellen Weavers Bowman” on New Zealand BDM website in October 2018:
1884/11792. Bowman, Elizabeth Napper. Mother: Ellen. Father: Harry
1885/17845. Bowman, Harry Alfred. Mother: Ellen. Father: Harry
1887/5680. Bowman, Ellen Weavers. Mother: Ellen. Father: Harry
1887/5685. Bowman, Hilda Emma. Mother: Ellen. Father: Harry

Subsequent search on the BDM website in October 2018, by incrementally changing the date range for the birth, shows Ellen Weavers Bowman and Hilda Emma Bowman would have been twins with Ellen born 3 September 1887 and Hilda into the next day on 4 September 1887.

Maiden name, year and country of marriage from search on New Zealand BDM website in October 2018:
1883/1265. Bride: Ellen Weavers. Groom: Harry Bowman

Full date of marriage of 17 May 1883 from further searching in October 2018 on BDM Search by incrementally changing the date range for the marriage.