The Gahagan (Goaghan ,Geoghegan, Goghan, Gaughan) Surname in County Roscommon Townlands in Pigot's Commercial Directory of Ireland, 1824
The following information was acquired from the CD book Pigot's Commercial Directory of Ireland, 1824. It is part of the Trinity college of Dublin Library Collection. This CD ROM is available through Archive CD Books Ireland and is part of their Archive CD Books Project. This CD Book describes its contents as follows:
"Pigot and Companies City of Dublin and Hibernian Provincial Directory of the Nobility, Gentry, Clergy, Professional Gentlemen, Merchants and Manufacturers of Dublin and upwards of 120 of the Principal Cities, Seaports and Towns of Ireland."
The Towns in County Roscommon that are covered in this Book CD are Boyle, Castlerea, Elphin and Roscommon. The Townland of Ballinasloe was also covered (it is listed as County Galway in this 1824 directory but both County Roscommon/County Galway in the 1846 Slater's Directory) but there were no individuals with the Gahagan, Goaghan, Geoghegan or Goghan Surname in Ballinsloe.
I couldn't find any individuals with the Gahagan, Goaghan, Geoghegan or Goghan, Gaughan Surname in County Roscommon Townlands of Pigot's 1824 Commercial Directory of Ireland.