Mary Marjorie Alexa Back1
She lived at Hobart, Tasmania, AustraliaG.1 From 1919, her married name became Gavan Duffy.
- [S47] BIFR1976 page 385. See link for full details for this source. Hereinafter cited as. [S47]
Reverend Guy Gavan Duffy1 
He was educated at Rome, ItalyG.1 He was the Parish Priest at Bacchus Marsh, Victoria, AustraliaG.1
Brendan Gavan Duffy1 
He was educated at Queen’s College, University of Melbourne, Melbourne, Victoria, AustraliaG.1 He was admitted to Solicitor.1 He fought in the First World War, with the Australian Imperial Forces.1
Children of Brendan Gavan Duffy and Alison McLeod
- Elizabeth Gavan Duffy+2 b. 1923
- Susan Gavan Duffy2 b. 1925, d. 1974
- Jane Gavan Duffy+2 b. 1932
Elizabeth Gavan Duffy1
Her married name became Searcy.
Children of Elizabeth Gavan Duffy and Philip Searcy
- Harriet Searcy1 b. 1948
- Sarah Searcy2 b. 1950
- Olivia Searcy1 b. 1952
- Louisa Searcy2 b. 1957
Philip Searcy1
La Harriet.1
Children of Philip Searcy and Elizabeth Gavan Duffy
- Harriet Searcy1 b. 1948
- Sarah Searcy2 b. 1950
- Olivia Searcy1 b. 1952
- Louisa Searcy2 b. 1957
Susan Gavan Duffy1 
Jane Gavan Duffy1
Her married name became Carson.
Children of Jane Gavan Duffy and Melville Carson
- Matthew Carson2 b. 1959
- Nicholas Carson2 b. 1960
- Emily Carson2 b. 1963
- Luke Carson2 b. 1964
Melville Carson1
Children of Melville Carson and Jane Gavan Duffy
- Matthew Carson2 b. 1959
- Nicholas Carson2 b. 1960
- Emily Carson2 b. 1963
- Luke Carson2 b. 1964