First two given names from New Zealand Electoral Roll - Stratford Main Roll 1975, found in February 2022:
Richards, Edna Olive, 6 Nelson St. Waitara, Married
Richards, Ernest John, 6 Nelson St. Waitara, Fitter

Date of death and burial, place of burial, estimated year of birth of 1924, found in February 2022 from New Plymouth District Council cemetery search:
https://www.npdc.govt.nz/services/cemeteries/cemet...hTo=1999&take=30
RICHARDS,Edna Olive
Last Address: 1 Blake Street,Waitara.
Age at Death: 69 Years
Date of Death: 25 Sep 1993
Category: Burial
Funeral director: Vospers Funeral Home, 257 Devon Street East, NEW PLYMOUTH 4310, www.vospers.co.nz
Date of burial: 28 Sep 1993
Cemetery: WAITARA
Location in Cemetery: Lawn Area, Plot 731

Maiden name from engagement notice found online in February 2022 that reads, “ENGAGEMENT
RICHARDS-BLANCHARD
The engagement is announced of Edna Olive, second daughter of Mrs. and the late Arthur Blanchard, Waiara, to Ernest John, eldest son of Mrs. and the late Ernest Richards, Brixton.

Year and country of marriage from search on New Zealand BDM website in July 2022:
1942/7069. Bride: Edna Olive Blanchard. Groom: Ernest John Richards

Full date of marriage of 18 July 1942 from further searching in July 2022 on BDM Search by incrementally changing the date range for the marriage.