McGlynn, Langan, Aegan, Tubber and Rosemount RC parish 1840s and earlier

Hi, Ireland Reaching Out, I may be pursuing an impossible task.  I know that my McGlynn/Langan/Aegan (maybe Egan) families came from the RC parish of Tubber and Rosemount. Thomas McGlynn senior was born around 1784, married Catharine Aegan, b. circa 1785.  His son Thomas junior was born in 1813, m. Bridget Langan in Tubber RC parish Feb. 22, 1841, with witnesses Michael Dolan and Dorothy Coffy.  Thomas junior and Bridget had a daughter Catharine baptized Feb. 27, 1842, in Tubber and Rosemount parish, with sponsors Patrick Gannon and Susan Maglin (probably her aunt).

Between 1842 and 1844 (when my greatgreat grandmother was born to the younger Thomas and Bridget in Maine, USA), the younger McGlynn family and the older McGlynn parents emigrated to the US. Some of the latter's children stayed in Ireland. They included Bridget, who married a Kane; Margaret, b. 1826 who married James Doolin in Tubber parish July 2, 1848; Anna, who married John Busby;and  Susan, who married a Clavin and a Remmington.

This is my tantalizing question - in what townland or townlands might the families have lived if their church was in Tubber/Rosemount? Is there any way of finding an answer to that question?

Many thanks for any help you can provide.