Irene Whitfield Oldbury lived at 1 Fitzroy St Killara in 1943 and 1949. (Electoral roll NSW).
In 1945 there was a death at that address for Newton Reed Johnston late of Christ Church NZ. He had been the widower of Victoria Mary and 3 sons are mentioned in his death notice. Victoria Mary died in NZ about 1906.
Looking at the NZ Electoral Rolls.. From 1914 Irene Whitford I'anson lived with Newton Johnson at his addresses in Canterbury NZ and stated spinster.
She last voted in NZ in 1938 at their shared address of 2 Gwynfe Ave.
From her first E.Roll registration in Australia, her surname changed to Oldbury.
She died in 1951. Death Notice
https://trove.nla.gov.au/newspaper/article/18235799 She was the ex-nuptial child of Christiana (nee Whitfield) born
1885 EDIT 1888 and on the
1891EDIT 1901 UK census she is with William I'anson and Christiana and is listed as a daughter. Along with Anthony, another of Christiana's pre-marriage births.
Birth
WHITFIELD, Athony Atkinson -
GRO Reference: 1887 Sept AUCKLAND. MMS -
Volume 10A Page 171
He died in Australia with the surname Maydwell-
MAYDWELL Anthony Atkinson
Mother Christina WHITFIELD
Father IANSON William
At MYRTLEFORD
Aged 69
1956/23829/
Irene must have visited England and is recorded returning to Aust in 1939
https://www.ancestry.com.au/discoveryui-content/view/66909:5378 Sue