I have a CD from the Latter Day Saints with Civil births and marriages. There are only two of Patrick and Honor Holleran's children:
Patrick Summerly born 1869 15 Nov. #441 Cloonbur, Galway
Kitty Summerly, born 1 May 1872,Cloonbur No.l Galway #255854
I came across all the spellings that you list in several resources. Griffith Valuations has most spelled Summerville.www.failteromhat.com
In the www.eircomphonebook.ie
Galway, are 6 Summerville's and 1 is in Clonbur. Might be worth letters to all with the information you know, no postal codes required outside Dublin. You can use the 'browse by location' for other
The 1911 Census has a family of Summerly's
Michael Summerly, Doughiska, Ballintemple at 60
wife Margaret 54, married 25 yrs. 5 birth, 4 living, all born Galway, parents cannot read & write
Thomas 18, Ellen 20
There are 30 listings for Summerville, Cloonbur, Galway
also two persons with the surname Summerville Martin and Summerville Simon?? www.censusfinder.com
Cemetary inscriptions can provide good family connections.www.nationalarchives.ie
I was going to try the UK Census but with the names making it very difficult, I would look if you don't have access.
wwwfamilysearch.org PILOT found under search records, I have never had so little success with a name. When I use Galway as the place I get 0 records, but if I just put Ireland a number of records appear.
Unusual for people to have more than one name. Note one
Bertha Summerville Marbaugh in Ohio, USA and other records.
'genealogy for fun'