Hello.
My late grandfather believed he was descended from the McDonnells of Antrim and had apparently done some genealogical research, which is now sadly all lost.
The furthest I can get back is John James McDonnell, born October 1853 in Liverpool, married Myra Fox 26th December 1874 in Warwickshire. All I know of his father is that he was called James McDonnell and was a surgeon, but other than that, I’ve hit a brick wall and no records on Ancestry line up.
There are many James McDonnells and the famous surgeon does not appear to be a connection, since the family remained in Ireland as far as I can tell.
My McDonnells settled in Birmingham.
Are there any potential relatives here, or otherwise any pointers?