Year and country of birth from search on New Zealand BDM website in February 2021:
1867/17147. Oliver, William Alfred. Mother: Sarah. Father: William Alfred

Full date of birth of 7 August 1867 from further searching in February 2021 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 February 2021:
1914/710. Oliver, William Alfred, died age 46Y [Therefore born circa 1868 which matches]

Full date of death of 14 January 1914 from further searching in February 2021 on BDM Search by incrementally changing the date range for the death.

Year and country of first marriage to Mary Julia McMullen from search on New Zealand BDM website in February 2021:
1890/62. Bride: Mary Julia McMullen. Groom: William Alfred Oliver

Full date of marriage of 14 January 1890 from further searching in February 2021 on BDM Search by incrementally changing the date range for the marriage.

Year and country of second marriage to Violet Lydia Constance Rutherford from search on New Zealand BDM website in February 2021:
1907/2684. Bride: Violet Lydia Constance Rutherford. Groom: William Alfred Oliver

Full date of marriage of 1 July 1907 from further searching in February 2021 on BDM Search by incrementally changing the date range for the marriage.