I am the grand-daughter of William R. Leffler, son of Blackburn Leffler and Mary Josephine McNamara. I have traced our family back to Blackburn's father John Leffler and can't get any further. They came here from Hamburg-Prussia area of Germany. John's brother Samuel married Mary Dalton, mother of the Dalton Gang. I also can't find a family crest or coat of arms for the name Leffler. Any help will be appreciated.