I am from Aberdeen and researching the family tree. From what you have said it appears that you are my 2nd cousin, once removed. I have a photograph of your grandmother Agnes among the family collection.
The entire Aberdeen branch starts with a William who married in Aberdeen in 1828. He had a son, William born around 1832. Among his 11 children was another William born 14 December 1862.
That William has 12 children. Apart from my grandfather, there was yet another William born 14 November 1892. Agnes was his daughter.
The whole family emigrated to the US, my own father (born 1920) among them. When the depression kicked in, my grandfather decided to return to Scotland.