How Did Co Roscommon Ireland Get Its Name?

Co Roscommon got its name from the Gaelic Irish. In fact almost every English name for a county in Ireland comes from Irish... When the English mappers where running around Ireland frantically drawing lakes, forests and rivers, they just asked locals what the name of a place was and would write down how the person said it, but in English. For example... Your question said about Roscommon.. This comes from the irish name for the county. Contae Ros Comáin - County Roscommon... See the similarity? Contae Dún na nGáll - County Donegal. Contae Longfort - County Longford.