Name from Lee Goleby in a message dated 2 July 2020. Lee is the great-granddaughter of Margaret Scanlan, who is the sister of our James Scanlan that married Ellen Jury (1881-1950).

Estimated month of death, year of death, from Lee Goleby who supplied the text from a newspaper article about Iris [Initial of ‘M’ is husbands initial]:
"Word was received in New Plymouth on Wednesday that Mrs M. Cavanah had died at Cambridge (the News, reports). The late Mrs Cavanah was a daughter of Mr A. P. O'Leary, of the Melbourne Clothing Co., and a niece of Mr Jas. Scanlan, managing director of the Melbourne. As a pianist the late Mrs Cavanah attained high degrees, receiving her tuition at Leipsig and Brussels, where she qualified as a gold medallist. During the war Mrs Cavanah was employed by the British Government in the Secret Service Department because of her perfect knowledge of German and other Continental languages."
Hawera & Normanby Star
12 September 1919
Volume LXXIV, Issue LXXIV, Page 4

Country of death, from death search on New Zealand BDM website in July 2020:
1919/10637. Cavanagh, Iris Elizabeth, died age 26Y [Therefore born circa 1893]

Full date of death of 9 September 1919 from further searching in July 2020 on BDM Search by incrementally changing the date range for the death.

Date and country of birth, date and place of death, year and place of marriage, from Lee Goleby in an email dated 22 July 2020.