Thank you for your query.Ihave checked the church records for Cahersiveen for Sheas and Lynch.

Ididn't find any births for your couple John Shea and Ellen Lynch.

I did  find births  for these couples Patrick Shea b1852 and Mary born 1863 children

of Mick Shea and Bridget Lynchof Killoe townland.John Shea b1854 son of Jerh Shea and Nora Lynch

of Dooneen. Daniel Shea son of Tom Shea and Betty Lynch born 1870 in Gortnagree.Con Shea b 1866

son of Dermot Shea and Nora Lynch.All these may be relations of yours.With every good wish.

Pat O'Leary.

Thank you for your response, I don't know how to prove that any of these are who I am looking for.

What I forgot to mention is that I have my Grandfathers WW2 discharge papers as he joined the Royal Engineers,  Sapper, in1917 L,W & D. WR328097. John was discharged in 1918 being no longer fit for war service aged 55. I have also found attestation papers for John Shea Caherciveen but there is no family name except on one he states he is living with Michael Murphy with Shea written above Murphy. High Street Caherciveen. 

 I have also found a Death record of John and Ellen O'Shea in Killognaveen John O'Shea Farmer died January 6th 1886 age 86 and Ellen O'Shea Febuary 12th, 1886.(No Maiden name) Patrick O'Shea their Son was with both at their death.. I don't know if these are my Great Grandparents but I can't find any documentation for them.. 

I don't know if you can help me any further with this informaton.

Kind regards

Patricia Lake.