for the death records you are looking for. Birth, marriages & deaths from 1864 to the 1950's. Some of these examples(not sure these are yours) give civil registration numbers to help get those civil registration copies from the source below. There maybe more than one couple *John Shea and Catherine Sullivan.
To me it looks like they had several children who passed away and a later child named the same, quite common in Ireland.
Timothy born 24 April 1867 Sneem, Kerry to John Shea and Cathrine Sullivan (occasional use of Kate) the Latter
Day Saints microfilm numbers C01184-7/101149
Patrick born 14 March 1869, #350 Sneem (I have not included the LDS Film #'s, but you can look these up)
Mary 17 April, 1871 #372 Sneem
Mary 16 Aug, 1876
John 27 May 1875 also 13 Jan, 1877
Daniel 14 Dec, 1876 & 09 July 1864 #0279 Sneem
Michael 27 Oct 1878
Bridget 03 Sept, 1873 Sneem][ 30 Jan 1874, Emlagh, Kerry
James 25 Apr 1877 Cools, Kerry
Myles 08 July 1879, Brackrass
Thomas 16 Jan 1880 Lohar
Sneem is a Village, in the Parish of Kilcrohane, Union of Kenmare (within 12 mi. radius of named place)
Emlagh, in the Union of Corkaguiny, Parish Dingle
or Union of Iveragh, Parish Cahersiveen
Cools, Union of Killarney Parish Aghadoe, Townland Cools
or Union of Cahersiveen, Parish Prior, Townland Cools
Lohard in Union of Kenmar, Parish Tuosist, Townland Lohart
also a Alohart, Union Killarney, Parish Knockane, TL Alohart
Brackran not found in Griffith place names, there were
244 John Shea's in Kerry in the Griffith Valuation 1853. If
your John not married possibily didn't occupy his own land at that time?www.failteromhat.com
(free) & www.askaboutireland.ie
(free) but more detail.
*Timothy Shea died 17 Nov 1907 Fall River, Mass. estimate born 1889 Ireland LDS Vo/pg 182 #4282842
*Jeremiah married 17 Feb 1914 age 25, Cambridge Mass.
wife Catherine Shea fa: Cornelius Shea/Mary Shine
These give parents names as John Shea & Catherine Sullivan
*Daniel J. Shea died 15 Jan 1935 Nashua, Hillsborough, New Hampshire fa: John J. Shea/mo:Catherine Sullivan LDS#4243254
*Denis died 1897. Massechusets, age 35, estimate born 1862 Ireland LDS100812-1/5947
*Ellen died Cambridge 18 March 1905, husband Eugene Brannon
Ireland: you should be able to get a copy of a birth, marriage or death certificate from the General Registry Office in Dublin, there are certain requirements www.groireland.ie
(see Civil Registration Districts with #)
unless you can find who the girls married it would be difficult to find their certificates.
there maybe some information for you in the church records on the website www.irishgenealogy.ie
Kerry is one of 4 counties that do not belong to a not for profit History Foundation where you can get records online.
By the time of the 1901 Census there are 458 John Shea's in Kerry. There are 130 Timothy's, note some in Emlagh.
No Myles/Miles, 71 Thomas and some in Lohar, also Emlagh son of Timothy 58;
Jeremiah Shea, seems to belong to Cornelius & Eliza Shea
That is about all the examples I could find on www.familysearch.org
and there were many more in the USA