In 1870, there was more than 14,000 Irish-born people living in New Orleans, Louisiana. William Sullivan born in Ireland about 1825, was a policeman in New Orleans in 1870. His wife Catherine was also born in Ireland about 1830. The death of Catherine, wife of William Sullivan, at age 49 in New Orleans occurred on 20 Sept. 1878. The newspaper account informs us that she was originally from Kenmare, Co. Kerry. Unfortunately, it has proved impossible to find her own family name thus far.
Irish American Weekly 12 Oct 1878.
1870 US Federal Census, Ward 2, New Orleans
For further research:
Louisiana. Metropolitan Police District of New Orleans Records