Isobel MacRae was the daughter of Farquhar MacRa - Ferachar Ban or Fair Farquhar- of Fadoch, Kintail in Scotland, and his wife Mary.
Isobel married Duncan MacRae, Donnachad Mor, Tacksman of Conchra, Lochalsh, according to a paper The Royal Descent of Certain Families of the Clan MacRae, which I believe was given to Annie Chamberlen, nee McRae, when she visited Scotland around 1906.
They had a large family, of whom ten have been recorded, including Duncan, Flora and Hector, who emigrated to Van Diemens Land in 1830.
Mary, born circa 1793, married Donald Matheson in Plockton about 1816. Her husband died in 1828 and she later emigrated to VDL with her children. She died at Broadford in Victoria in 1878.
Alexander was a doctor, possibly in the East India Company.Christina married Duncan Finlayson, a shipowner, as were her sons.
Margaret married McDonnell and kept a store in Plockton.
Farquhar drowned at Auchnahinnish with no descendants.
Catherine married Dugald [?] Matheson of Liverpool who was in charge of a brewery on the Ilse of Man in 1852.
Christopher went to Canada with his mother and brothers, Duncan and Hector. He married Nancy and it seems that they may have stayed there, when their brothers returned to Scotland around 1829.
Flora, born c 1800, married Roderick McKenzie when she was 20 years old. They emigrated to VDL with their children, her brothers Duncan and Hector, and his brother, Alexander McKenzie in 1830. The McKenzies later took up land in Victoria, near Broadford.