Surname of “McIsaac” from the Will of his wife’s father, “Benjamin Roberts” signed on the 20 February 1951 and added here in September 2023.

First two given names, date and place of birth and death, place of burial, headstone inscription, from Find a Grave website found in September 2023:
https://www.findagrave.com/memorial/256279545/charles-bruce-mcisaac
BIRTH: 12 Apr 1914 Seddon, Marlborough District, Marlborough, New Zealand
DEATH: 12 Aug 1983 (aged 69) Wellington, New Zealand
BURIAL: Archer Street Cemetery, Masterton, Masterton District, Wellington, New Zealand
In Loving Memory Of
- McISAAC -
DAISY (Dot)
Loved Wife Of Bruce
Died 24th May 1980
Aged 68
CHARLES BRUCE
Loved Husband of Dot
Died 12th August 1983
Aged 69

Year and country of marriage from search on New Zealand BDM website in October 2023:
1940/8639. Bride: Daisy Roberts. Groom: Charles Bruce McIsaac

Full date of marriage of 29 June 1940 from further searching in October 2023 on BDM Search by incrementally changing the date range for the marriage.