There is only one entry for MAWBEY in the WA index of births, deaths and marriages.
This was for a marriage betweeen WILLIAM MAWBEY and EMMA THOMAS at Boulder in 1910.
The Perth Gazette, 3 and 10 November 1871
Family Notices. Died. Clifton. On Oct. 29th, at Leschenault, near Bunbury, after a lingering illness, aged 55, ANNETTE JOSEPHINE MAWBEY, the beloved wife of W. Pearce Clifton, Esq, Resident Magistrate, youngest daughter of the late Rev. W. Huet of Idlicot, Worcestershire.
She was ALICE, his third child and first daughter, who was named after her maternal grandmother.