Looking for Connelly's or Hanlon's

My great grandfather James Connelly married Therese Hanlon in Dublin in on or about 1866. They lived in Liverpool and emigrated to America around 1870. I believe they had relatives or other family in Manchester and Sheffield. I was once told that James Family may have come from Sligo. My grandfather, Thomas Connelly, married Katherine Horan in Kansas in the late 1890's. Katherine's mother was a Brennan and her family may have come from the Sligo area. I know this is a shot in the dark, but thought I would ask around. The spelling of Connelly may have been different than what it is now. It may have been Conolly. Thank you. Kerry