I'm trying to find the connection between Michael & Annie Lanahan, James & Abigail Lanahan, Rose Crosby and Peter & Ann McGovern. James Lanahan's mother was Susan Crosby, possibly Rose's sister or sister-in-law. I beleive that they are all related, they all show up in family graves in Cathedral and New Cathedral cemeteries in Philadelphia. I haven't found the connection. The Lanahan family comes from the Strokestown area of County Roscommon, Ireland. Can anyone offer any assistance?