Think family tree is working out nicely
When Timothy McGill married Anne Kavanagh in 1881 his father's listed as Denis McGill, shoemaker.
Timothy & Anne McGill had 8 children according to 1911 census (I've found all eight).
The youngest daughter Bridget/Brigid was a teach and died unmarried in 1963.
Daniel McGill, shoemaker, married Bridget Bann and had at least 4 children. The 2 surviving sons, Richard & Joseph, didn't marry. Richard died 1943 leaving brother Joseph who died 1946.
When Joseph McGill died in 1946 his death was registered by his first cousin Bridget MGill (Timothy & Anne's daughter)- see above.
Thus, Timothy and Daniel must have been bothers.
From census & death records we know that Daniel McGill had at least 3 other brothers: Denis, Joseph & Bernard.
Now, there's Christopher McGill. Like Timothy, Daniel, Joseph & Bernard, Christopher started out as a shoemaker in Rochfortbridge. Between the births of children in 1875/1876 he became a prison warden, eventually ending up in Belfast.
I'm fairly certain that Christopher is another brother to Timothy McGill.
The above is merely a brief outline but I've pages of notes with sources, etc. done up into a family tree - too much to post here. If you are interested just send me a Personal Message with an email address (we aren't allowed to post information like that on the threads.)
