While Victorian Electoral rolls have been posted previously I thought I'd post them
all in the same place, in year order to see if anything looks clearer.
1914 Walter Henry ENSTON - Painter
Mabel ENSTON - Home Duties
25 Palermo St South Yarra
1919 Ruby EUSTON - Elliminyt - Home Duties
1919 Walton Harry EUSTON - Farm Labourer
Ella Gertrude EUSTON - Home duties
Bayswater
1924 Walton Harry EUSTON - Painter
Ella Gertrude EUSTON - Home duties
11 Rugby Rd, Oakleigh
1931 Ella Gertrude EUSTON - Home duties
42 Hotham St, Oakleigh
1936 Ella Gertrude EUSTON - Home duties
1 Latrobe St Oakleigh
(Maybe these will be helpful somewhere along the line

1903 May EUSTON - 363 Little Collins St Melbourne - Bar Maid
married Wm Jas Hudson SCOTT 1920
died 1946 63 Froy Father-John Euston Mother-Mary Hamilton1924,1931,1936
William John EUSTON - Electrician
William John EUSTON aged 73 died in HEID in 1969
Father = Collier Maxwell EUSTON & Mother = UNKNOWN
Ref = 5469Winifred Isabel EUSTON - Home duties
28 Ames Ave, Murrumbeena
Wm John Euston married Wfred Isabel Barton 1920Does this provide any clues?

Raylen
**edited to add more details