We have some books on Castleknock History in Dublin City Libraries and you could try the following resources:
The National Library of Ireland for Parish records and Genealogy Advisory Service www.nli.ie
Free Genealogy Advisory Service – The National Archives of Ireland https://www.nationalarchives.ie/
Pastimes in Past Times, « Blanchardstown-Castleknock History Society (wordpress.com) https://blanchardstowncastleknockhistorysociety.wordpress.com/heritage-week-2018/
We have some books on Castleknock History in Dublin City Libraries and you could try the following resources:
The National Library of Ireland for Parish records and Genealogy Advisory Service www.nli.ie
Free Genealogy Advisory Service – The National Archives of Ireland https://www.nationalarchives.ie/
Pastimes in Past Times, « Blanchardstown-Castleknock History Society (wordpress.com) https://blanchardstowncastleknockhistorysociety.wordpress.com/heritage-week-2018/
Irish Genealogy - https://www.irishgenealogy.ie/en/
Good luck with your search