It is not easy to find exactly where people who came to Scotland from Ireland were born. If they were married in Ireland and went on to have children born here, the place of marriage would be given on the child's birth certificate. Unfortunately this does not apply in your case. The census is rarely of any use, as the person's birthplace is usually just given as "Ireland" (some are more precise). Using the person's parents names (from their death certificate), their age and the names of their children, can point you to possible origins. The best source for finding a precise origin, however, tends to be the records of the parochial board if someone applied for poor relief.
