Descendants of Edward Russell of Scotland

Would love to have any info on ancestors further back that my g-g-grandparents, Edward Russell 1824-1885, and Margaret Thomson 1834-1913. They were married 22Jan1855 in East Parish, Greenock, Renfrew co., Scotland and had my g-grandmother Margaret Rankin Russell in 1855. Margaret R Russell (photo) married my GGrandfather William Horace Jones in 1884 in Hoboken, NJ, so I know they came to America between 1855-1884. Edward Russell was the son of Edward Russell, and Margaret Thomson was the dau of Hugh Thomson and Margaret Rankin.