Hi Barbara I have some very good friendswho are named Marsh. The live in Washington state but I believe they originated from California. They are wonderful people and I love them very much. His name is William marsh. He has three sons. Oldest son is Robert, Kirk, and Brian I do not know if that will help you out but I hope it does.
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?