Michael Lynch and Eileen Curley or maybe Kiely

Beginning with the generation which is my huge brick wall - despite my best efforts since 1999, I am unable to find my great grandparents, Michael Lynch and Eileen Curely Lynch on any census and their birth,death or marriage certificates,  What I do know is that they lived in the Mt Pleasant area of Limerick.  

I do know they had the following children:

Michael Lynch - Not confirmed

Catherine Lynch - Not confirmed

Josephine Lynch (1891-?) married a Michael (maybe Edward) Ryan and settled in the Nenagh area - I am in contact with some of their descendants but they have no info on my brick wall.

Mary "Mae" Lynch (1898-1982) married a Daniel Ryan - she also settled in Nenagh,  Most of their children settled in England. I do not know if the two Ryans are related.

My grandmother, Eileen Lynch (1896-1940) was born about 1896.  She married my grandfather, Hugh McDade (who was from Letterkenny) in Limerick in 1923 settling Glasgow. I do have her marriage and death certificates.  Early in my research, I had a researcher look for her birth certificate, they were not able to locate it.  From her marriage certificate, I found her parents names.  Her father was listed as deceased and his occupation was a farmer.  Her mother's last name was Curley.  However on her sister's (Mae) marriage certificate, it was listed as Kiely.  From my grandmother's death certificate it stated her mother was still living in 1940.

I have used the most the usual research sites trying to find any information about the Lynches but to no avail.  I am perplexed that I can't even find one of these family members on the 1901/1911 census.  So any suggestions/hints provided, I would be most appreciative.

Eileen Sullivan Tormey