Hi,
From the information I have collected:
http://traceyclann.com/files/Roscommon.htmPatrick/Patricium Trac(e)y m. Eliza/Betty/Elizabeth/Ellizabetham Higgins 11 January 1861 RC Killinvoy and Killmain (LDS) (see 1901 census Knockcroghery Village)
Anne b. 20 August 1864 Roscommon Roscommon (LDS)
Henry b. 12 April 1866 Roscommon Roscommon (LDS)
John b. 26 October 1868 (LDS)
Catherine b. 19 June 1870 (LDS)
Elizabeth b. 23 July 1873 (LDS)
James b. 22 October 1875 Roscommon Roscommon (LDS)
Bridget b. 6 June 1877 (LDS)
Patrick b. 14 June 1879 (LDS)
If you get the State Registration Certificate for a birth after 1864, it will give you the townland that they lived in. From that you should be able to see who lived in that townland in the Griffiths Valuation and Tithe Records.
Here are the details for Henry:
Tracy, Henry Roscommon, Roscommon. 1866 8 409
Also the easiest place to find RC parish record details and maps is John Graham's Irish Times website. Use the sitemap to list the contents of the website. The church parishes for Roscommon are located at:
http://www.irishtimes.com/ancestor/browse/counties/rcmaps/roscommonrc.htmRegards,
Dec