Looking for Ancestors of My Great Great Great Grandfather James Dur

Looking for ancestors of my great, great, great grandfather, James Durham of Ontario, Canada. I don't know if he was the one who left England for Canada, or if it was an earlier ancestor. I also don't know my great, great, great, great grandfather Durham's first and middle name, if he was born in England or Ontario, Canada, or where in England or Canada, or on what date in what year.