My Great-Grandmother's maiden name was Kilroy. She would have been the same generation as your G-GF. She emmigrated from Cty. Leitrim c. 1890-95 and married Edward Gilmartin of Jersey City. Her children included my GM, Margaret Gilmartin, and also Edward, Joan, Mary, Peter, and Catherine.
I'll look in the family archives to find my G-GM's first name and if she had siblings.