This is going to be difficult. I am researching the Tweedie family, which from my research is a very old Scottish family. My grandfather is a Tweedie and is from Glasgow, but when I researched his family I found that his Great Grandfather is actually from Ireland. The trouble is, I don't know from where.
This is what I know about him;
David Tweedie born about 1845 in Ireland. First appearance in Glasgow is in a marriage record where he married Ann Robertson, also from Ireland, in 1876. He was a Brickfield Labourer and his parents are listed as John Tweedie, agricultural labourer and Martha Pendleton (I don't think they came to Glasgow as there are no records on ScotlandsPeople for them). He was a Presbyterian. He died on 18 Aug 1906.
Here's my guess; I think that he and Ann Robertson came from the same part of Ireland and arrived in Glasgow together to get married and start a new life. There are other Robertsons as witnesses on the Marriage Record so it looks like other members of her family went with them.
Also, correct me if I'm wrong, but from looking around it seems that Tweedy is the more common spelling of the surname in Ireland whereas Tweedie is the original, more Scottish spelling. All his records say Tweedie but that might not mean anything.
I have my suspicions that he is connected to the Ulster Scots but I have no proof of this.
Looking on Irish genealogy websites has turned up nothing, but then again I don't know where to look.
Is there anything I could do to help make my search easier?