Hi melsimba66
If they married in Lochlee Angus, there's more than a good chance she was from that county….the bride's home Parish was the traditional location for a marriage to be solemnised
You say " Ann Thow born 1801 , Aberdeen ? " and she and John are both age 52 in the Aberdeen Census of 1851.
Yet the only match for that is in 28 Charleston Road, Aboyne, Aberdeen.
Wife: Ann FORBES 52, Proprietors wife, b Glenesk Forfar
Is that her?
In looking for naming patterns in their children…...
Do you have a list of their children - in order of birth?
Do you know the names of John FORBES' parents?
Did she live past 1855 - in which case her death certificate would hopefully name her parents.
added: The Ann FORBES of the 1851 above, was still living in 1861 at Toll-houses Charlestown, age 64, Toll-collector, born Glenesk, Forfar.
Cheers
AMBLY