This is on Ancestry also, on another thread re DIETZE
Evelina STANAWAY (daughter of John STANAWAY & Susannah GUY, b. LISKEARD, CORNWALL Sept qu 1871) marriage to Richard Henry SANDOE, registered PLYMOUTH, DEVONSHIRE, ENGLAND March quarter 1895
This birth to that couple in NSW (child died in 1896):
35773/1895 SANDOE ELSIE M / RICHARD H / EVELINE / PETERSHAM
Evelina STANAWAY (not SANDOE) marriage to August Robert Curt DIETZE registered NEW SOUTH WALES, AUSTRALIA 1906
Richard Henry SANDOE (born TRURO, CORNWALL) marriage to Elizabeth Emily BURLACE registered PLYMOUTH, DEVONSHIRE, ENGLAND December quarter 1907
A Mrs E. Sandoe arrived in Sydney NSW aboard Oruba, as a 3rd class passenger from London 5th Oct 1895. Can't see Richard's arrival, unless he is the Mr Sandoe arriving in 1900 on Gabo! I guess it is possible she came alone (pregnant perhaps?), but she definitely stayed and made a new life for herself.
The Sydney Morning Herald, Thursday 24 April 1952
DIETZE Evelyna.-April 22, 1952, at her son's residence, 77 Hollywood Street, Kogarah, relict of August R. Dietze, loved mother of Joseph (K.I.A., 1918), Elsa (Mrs. McKenzie), Walter, Greta (Mrs Watts), and Conrad aged 80 years. Privately interred April 23, 1952, Methodist Cemetery, Rookwood.
The Sydney Morning Herald, Saturday 15 June 1929
BODY FOUND IN CAVE
The circumstances surrounding the death of August Robert Dietze, 68, who was found in a cave near Hazelbrook on Wednesday night were inquired into by the coroner at Katoomba to-day.
Walter Robert Dietze, son of the deceased stated that his father, a retired merchant who lived at Earlwood, recently returned from a world tour and had contemplated a trip to England or Germany this year. Witness said that his father loved wandering in the bush and often left home for that purpose. Dr. Alexander Allan, Government Medical Officer, stated that in his opinion death was due to heart disease, accentuated by the cold weather. The Coroner returned a finding of death due to natural causes.
Assume you are decended thru Richard & Elizabeth then...what info do you already have?
Looks like Richard aged 17 in 1881 census with mother Amelia (48) and brother Wm (7); he is an engine smith and they are in St Agnes, Cornwall. In 1871 he is aged 7, with mother Amelia (37, miners wife), in Truro, Cornwall; as SANDOW. In 1861 Amelia (26) is with husband Thomas (26, copper miner) and daughter Mary (3), same place, as SANDOE. All born St Agnes, Cornwall.
Marriages Jun 1858 (>99%)
Martin Amelia Truro 5c 259
Sandoe Thomas Truro 5c 259