Have just realised I did not say how I fit in with the Douglas-Willans.
But I have got involeved with two researchers who are working on two different General Robert Douglases, and both of them have grandchildren who married into the Willan family - and my interest has been aroused so that I am trying to link those two families.
Thomas Willan (your ancestor) is a fascinating man. He owned farms in (what is now) London and elsewhere; he had between 800 and 1000 dairy cows; he built Twyford Abbey; he was a stagecoach proprietor; he was a leading agriculturist/nutritionist in his time trying to find the best feed for his horses to maximise their efficiency. But who was his wife? Who were his parents? He must have been one of the wealthiest people of his time, but very little is know of him.
The more information you can give about the people you mention, the more chance there is of someone else connecting with your family.
Dates and places of births, deaths and marriages all help to place families.
Professions also help.
'My great-grandmother mother was a Douglas from Montrose' does not give many clues to follow up! But a bit of flesh on the bones makes further research possible. But if we are told who she married, what his profession was and where the children were baptised, then we can get to work.
Maybe it is time to update the information in your profile?