First two given names from New Zealand Electoral Roll - Marsden General Roll 1954, found in November 2018:
McKoy, Shirley Dawn, 74 Kamo Road, Whangarei, married
McKoy, Samuel Hugh, 74 Kamo Road, Whangarei, clerk. [Husband]

New Zealand Electoral Roll - Rotorua Main Roll 1963, found in November 2018:
McKOY Shirley Dawn, 10 Pearce Place, Rotorua, married
McKOY Samuel Hugh, 10 Pearce Place, Rotorua, pub serv. [Husband]

New Zealand Electoral Roll - Mt Albert Composite Roll 1981, found in November 2018:
MCKOY, Shirley D, 40 Parrish Road, Married
MCKOY, Samuel H, 40 Parrish Road, Clerk [Husband]
MCKOY, Barrie, 47 Fourth Avenue. Glazier [Son]

New Zealand Electoral Roll - Mt Albert Composite Roll 1981, found in November 2018:
MCKOY, Shirley D, 40 Parrish Road, Married
MCKOY, Samuel H, 40 Parrish Road, Clerk [Husband]
MCKOY, [NAME WITHHELD], 40 Parrish Road, Mechanic [Son]
MC KOY, Sandra Therese, 40 Parrish Road, Shop Asstant [Daughter]

Estimated year of birth from son Patrick, in an email dated 3 August 2020, “…mum doesn’t do emails or computer as she is 90 years old.”

Year and country of death, date of birth, from death search on New Zealand BDM website in February 2025:
2025/2042. McKoy, Shirley Dawn. Date of birth: 21 January 1930

Full date of death of 13 January 2025 from further searching in February 2025 on BDM Search by incrementally changing the date range for the death.