More usually written Sodan. There were three districts of this name in Ireland, of which the most celebrated was in Hy-Many, in Connaught, for the extent of which see Tribes and Customs of Hy-Many, pp 72, 87, 89, 90, 91, 130, 164. The second was in Meath, and the name is supposed to be preserved in that of the parish of Siddan, anciently Sodan, in the barony of slane. The third was in the territory of Fernmhagh, now the barony of Farney, in the county of Monaghan. The Soghan referred to in this document is evidently in Meath.