just for reference to help any searches - there are three townlands in Co. Sligo named Carrownamaddoo,and these are located in the civil parishes of Ahamlish, Skreen and St. Johns.
If I have the correct Bridget and Mary Hanney on the 1901 census then this Carrownamaddoo was the one in St. John's civil parish - i.e. Sligo town. If this family were RC then the parish would also be St. John's, Sligo town. An RC marriage from this time will probably only include names of the bride, groom and witnesses. If the couple were non-Catholic then a civil record should be available for an 1850s marriage, and a cert should show father's names and occupations - mother's names are not included on Irish Civil certs.