John and Rosehannah Graham

I'm looking for John and Rosehannah Graham . John 1805 and Rosehannah 1810. I have located them and their family in Ohio in 1860. The children were John, Christopher, Joseph.and Daniel. There may have been More. I believe that the sons John and Christopher may have came to America First and the rest of the family a year or two later. In the cencus Christoper says he came in !851 and family says he said he was born in Dublin. His younger brother Joseph says that he was born in Galway in 1852 so the last we know was Galway. Some say the family came in 53 and some say 54.  Not sure when they came but probably from Galway. We do know Rosehannah's name was Mullins. Would love to know when and where they came from and connect them back further. They were Catholic. Thanks for any info anyone may have.