I search Irishgenealogy.ie, a new, FREE, online database of surviving Co. Kerry church B/M/D records. I found the following:
Baptism of ELLEN SHEA of TRALEE on 20 June 1858 Parish/Church/Congregation - TRALEE Area - KERRY (RC) Name ELLEN SHEA Address TRALEE Father JOHN SHEA Mother HONORA MCGILLICUDDY Further details in the recordDate of Birth 17 June 1858 Sponsor 1 PHILIP MCGILLICUDDY Sponsor 2 MARGARET MCGILLICUDDY
There are NO earlier M rcds for the parents. There also are NO other B rcds for possible siblings.