A search of the New Zealand historical BMD's shows she died in 2024 (DOB 24 Nov 1929) ref 2024/38108.
She was the d of Rodney Devereux MAKGILL (1901-1955), scion of the Viscounts of Oxfuird being descended from the 3rd s of the 10th Viscount, and (m 1923) Laura REYNOLDS (d 1998). She m 1954 Edward SMITH (d pre-2017) and had issue a s and 2 d