Hi Brendan
The only information I have regarding John Curran, my 3 x great grandfather, is that he was born about 1799 in Derry I think, he came to Scotland in the early 1800's and married Agnes McGregor who was born about 1811 in Glasgow. I have his death as about 1863 but that is to be confirmed. One of their children is Alexander Corns, my 2 x great grandfather, born about 1840 in Glasgow, married Mary Baird in Glasgow in 1863, his death is listed as 1923 in Buckhaven, Fife, Scotland. One of their children is Charles Corns, my great grandfather, born in Slamamman in 1874, and he married Mary Selfridge born in Shotts in 1876. So far I haven't been able to find out when or why John Curran/s came to Scotland and if the name change was a spelling mistake or intentional. I've not done any checks on the Corns tree for a while, so the information I have regarding John Curran is limited. I hope what I've written here is of help to you and look forward to hearing from you in due course.