Name from Obituary of husband, Dean, found in July 2025 at:
https://notices.nzherald.co.nz/nz/obituaries/nzher...obituary?id=41124844

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

Looking at the above Roll, now married as at 1957. In 1954, husband Dean was living with parents. Therefore married circa 1956.

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