Name, date of birth and death, from photo of headston found in June 2025.

Confirmation is son of Gordon and Margaret from the New Zealand Electoral Roll - Mt. Albert General Roll 1954, found in June 2025:
Graydon, Dean Gordon, 185 Mt. Albert Rd., SW2, linesman (R)
Graydon, Gordon Percival, 185 Mt. Albert Rd., SW2, tunneller (R) [Father]
Graydon, Margaret Annie Sinclair, 185 Mt. Albert Rd., SW2, married (R) [Mother]
Graydon, Allan Ralph, 185 Mt. Albert Rd., SW2, printer (R) [Brother]

Year and country of death, date of birth confirmed, from death search on New Zealand BDM website in June 2025:
2010/25092. Graydon, Dean Gordon. Date of birth: 22 June 1933

Full date of death of 10 October 2010 confirmed from further searching in June 2025 on BDM Search by incrementally changing the date range for the death.

Name of wife and children, from Obituary found in July 2025 at:
https://notices.nzherald.co.nz/nz/obituaries/nzher...obituary?id=41124844
Dean Graydon Obituary
GRAYDON, Dean Gordon. Passed away suddenly at home on the 10 October 2010 aged 77 years. Loving husband of Elizabeth. Treasured and loved father of Scott and Shanley. Father-in-law of Trevor and Naomi and grandfather of Rory, Emma, Sandina and Oceania. Respecting Deans wishes a private cremation will be held on Wednesday 13 October.

Wife appears in the 1957 New Zealand Electoral Roll - Eden Main Roll 1957, found in July 2025:
Graydon, Dean Gordon, 171 New North Rd., director
Graydon, Elizabeth Nina, 171 New North Rd., laboratory assistant

New Zealand Electoral Roll - Mt Roskill Main Roll 2010, found in July 2025:
Graydon, Dean Gordon, 22 Maioro Street, Retired
Graydon, Elizabeth Nina, 22 Maioro Street, Married

Living in Auckland in 2010, the year of Dean’s death. Obituary further above had him pass away at home. Therefore, died in Auckland.