For background on how the map was made (and its flaws), see the relevant blog entry.
|De Roiste||rare: South East. Ir.Lang. See Roche.|
|Roache||fairly rare: Mayo etc. Ir. de Róiste. See Roche.|
|Roche||Very numerous: Munster and South East etc. Ir. de Róiste, from French roche, a rock. Normans who became established in Wexford and Munster after the Invasion. The area round Fermoy was known as Críoch Róisteach (Roches' Country). IF.|