Dear Estelle,
My name is Clare Horgan I am a volunteer for the Claregalway Parish area in Co. Galway
Jane asked me to assist you with your Clarenbridge roots to help you with your trip later this year.
I did a little research on resources available to me. I hope some of it is helpful to you in your search for ancestors.
By just googling your information, I see you have been in conversation with others on other boards over the last couple of years too. So, there is a little repeating.
Please find the attached documents you were looking for.
Firstly, I double-checked the dates that records were recorded for births in the parish of Clarenbridge (Kilcornan)
https://heritage.galwaycommunityheritage.org/content/places/clarinbridge-heritage/places-clarinbridge-heritage/kilcornan-church (free access)
Baptismal Records are from 7 Aug 1854 to 29 Mar 1881
https://registers.nli.ie/parishes/0619 (free access)
Double-checking your dates for siblings, I found and can confirm born was a:
WILLIAM JOSEPH, Castlebar (Clarenbridge) DOB 09-Sep-1861 Parents: John Howley & Mary Silver (Syler) Sponsors Patrick Silver & Bridget Silver
CATHERINE MARY, Castlebar (Clarenbridge) DOB 18-Dec-1863 Parents: John Howley & Mary Silver Sponsors John Howley & Mary Howley
JAMES JOSEPH, Castlebar (Clarenbridge) DOB 19-Aug-1866 Parents: John Howley & Mary Silver Sponsors John Poniard & Margaret Howley
BARTHOLOMEW, Castlebar (Clarenbridge) DOB 18-Dec-1868 Parents: John Howley & Mary Silver Sponsors Patrick Ryder & Honor Howley
HONOR MARY, Castlebar (Clarenbridge) DOB 09-Apr-1871 Parents: John Howley & Mary Silver Sponsors Patrick Howley & Bridget Howley
(Records were found on rootsireland.ie (subscription website). You can see original records on the https://registers.nli.ie/parishes/0619 (free access)
Do you have any more information on your great grandmother Delia (Bridget is another name for Delia). Date of Birth. Where are you getting your information from?
Townlands.ie is a great website to find out the location and info on the different townlands your ancestors lived.
Castlegar https://www.townlands.ie/galway/dunkellin/killeely/killeely/castlegar/ (free access)
Rathbaun https://www.townlands.ie/galway/dunkellin/ardrahan/skehanagh/rathbaun/ (free access)
I too looked for graves but with no look. You may have had some luck yourself with others help.
Here is a grave I found in Ardrahan graveyard, I would not be concerned that not all records and graves are all in Clarenbridge, they are very close to each other.
https://historicgraves.com/ardrahan/ga-ahan-0139/grave (free access)
This might another website you might to look at. It would be done up by the current community living in Clarenbridge and interest in the local history and families of the area.
https://heritage.galwaycommunityheritage.org/content/category/places/clarinbridge-heritage (free access)
https://www.facebook.com/clarinbridgeheritage (free access)
You may have to go down the root of a professional genealogist who can do more detailed research for you. Let me know if you need any help with finding someone.
If you wish to contact me for any help and guidance, I would be only delighted to help.
My email is claregalway@irelandxo.com
Best of luck
Clare