I am searching for information about my great-grandmother, Catherine Kerrigan Rowley. She always was called Kate. She was born in November, 1862 in Northern Ireland. She came to the U.S.A. in 1880, according to the census records and settled in Philadelphia. She married Bartholomew Rowley in 1885. They had 8 children together, but I only know the names of six. I assume the other two died in infancy. Ellen, Bartley, Marie, John (my grandfather), Kate and Annie in that order are the six I am aware of. She lived in South Philadelphia and died in March, 1921. She raised a nephew, John H. Gallagher, who I assume is a son of a sister.
I would like to know where in Northern Ireland she came from, the names of her parents, any siblings (especially John Gallagher's mother). Any help is appreciated.