Do you have more details on the ancestry of John ROBERTSON in Auds, Boyndie, the father of Isabella ROBERTSON?
I believe he married 20-10-1818 Kirkmichael, Ban. For some reason, his wife's name is Janet GRANT (per marr, 1841, 1851 & 1861 censuses), yet the baptisms of their children all have her as Margaret GRANT.
I'm trying to find the parents of Elspet ROBERTSON (supposedly a farmer ROBERTSON and Jane MOIR). B abt 1785, she married John GEDDES in 1809 in Portsoy, and I think the Margaret GEDDES at your ROBERTSONs at Auds in 1841 is their daughter. Furthermore, another daughter Jessy GEDDES m William WATSON, and family were at Carmelite St and Bridge St in Banff, maybe just a coincidence, but...
I've just found that John GEDDES & Elspet ROBERTSON were Catholic. Given the Kirkmichael connection as well as the GORDON surname, is there any Catholic dimension in your ROBERTSONs?
A bit of a long shot all this, but maybe there's a connection.
Howard