What is "ressad"

Ressad or Ress refers to a now lost city and possibly also to a territory that is still unidentified but believed by scholars to have been somewhere within the borders of modern County Limerick in western Ireland, in what was once the territory of the kingdom of the Uí Fidgenti.

The name occurs in only a small number of surviving sources, which for this region of Ireland, of respectable wealth itself, are generally quite poor.