I can't tell if you have the link to the online parish register for Kilmichael http://registers.nli.ie/parishes/0069 or have visited www.irishgenealogy.ie which has church records for the Diocese of Cork and Ross which includes Kilmichael.
Regarding the name for Julia, the parish register on the 1855 baptismal record you sent in the other message shows Culnane. Note her brother who was one of the witnesses. Other records show Cullinane and her first name as Jude. I found their marriage record in Kilmichael in April 1836. There were two other children baptized in 1837 and 1839.
I would first use the www.irishgenealogy.ie site search for Timothy Sheehan from 1836-1860 in Kilmichael church and you should find the marriage and the baptismal records. The family initially lived in a place called Tomes which I can't identify. Some place names were not made official townlands.
Let me know what questions you have.