In my updated timeline for the Robbs of Auchterless, I included the information that a Margaret Robb married a George Maitland in 1745. Then, in 1748, James Robb at Mains of Badenscoth was a witness to the birth of George’s daughter, Isabelle. I mistakenly transcribed George’s location as Inverkeithny (in Banffshire), when on closer inspection in turns out to be Inverthernie, not far from Towie, in Auchterless.
The full list of children born to George , and presumably Margaret, is as follows: Alexander (1747), James (1747), Isabelle (1748), James (1751), Anne (1752), Adam (1753), William (1755) and Margaret (1758).
The fact that James (who married Barbara Raeburn in 1743 and would later live at Bruckhills) was a witness to at least one of these children’s baptisms suggests that Margaret was a member of the same Robb family. My current hypothesis is that she was a sister to James, Alexander, John and George.