Given name from birth search of son on New Zealand BDM website in April 2019:
1907/8559. Ferguson, Arthur Robert. Mother: Daisy. Father: William John

Maiden name, year and country of marriage from search on New Zealand BDM website in April 2019:
1904/5459. Bride: Daisy Ralph. Groom: William John Ferguson

Full date of marriage of 21 September 1904 from further searching in April 2019 on BDM Search by incrementally changing the date range for the marriage.

Children of Daisy and William found on the New Zealand BDM website in April 2019:
1905/674. Ferguson, Alfred William. Mother: Daisy. Father: William John
1906/2754. Ferguson, John. Mother: Daisy. Father: William John
1907/8559. Ferguson, Arthur Robert. Mother: Daisy. Father: William John
1909/15903. Ferguson, Daisy. Mother: Daisy. Father: William John
1911/14758. Ferguson, Harold Lawrence. Mother: Daisy. Father: William John
1914/7314. Ferguson, Lily. Mother: Daisy. Father: William John
1917/4529. Ferguson, Alice. Mother: Daisy. Father: William John

Year and country of birth from search on New Zealand BDM website in April 2019:
Registered 1886/4000. Ralph, Daisy. Mother: Hannah. Father: Alfred Berry

Full date of birth of 28 December 1885 from further searching in April 2019 on BDM Search by incrementally changing the date range for the birth.

Year and country of death, from death search on New Zealand BDM website in April 2019:
1944/27085. Ferguson, Daisy, died age 58Y [Therefore born circa 1886 which matches]

Full date of death of 21 August 1944 from further searching in April 2019 on BDM Search by incrementally changing the date range for the death.