Ah, you'd need at least a NAME, son!  There are thousands of us Maxwells whose ancestors came from Scotland to settle in Ireland.  Find the oldest living relative you have, get all the information you can, then keep checking the census records till you get to where they emigrated to wherever.  Don't forget, Celts were not well treated by the bloody Brits, so any information that was important to the Celts was garbage to the Brits.  You can't trust a so-called Christian government that believes it's all right to allow millions of people to starve to death because they considered them "inferior".