I am actually researching the Joyce branch of my family, but there seems to be a tie to the Warrens of New York. My GGgrandfathers mother was Anne O'Connor (1842-1879). Her two sisters married men with the last name of Warren.
Bridget O'Connor (died 1892) married Samuel Warren (1832-1897) and raised a family in Watertown, NY.
Margaret O'Connor (1849-1927) married John Warren. They had one daughter, Minnie.
I am trying to find out more information on the family back in Ireland.