Is this name irish or scottish?

Help! Irish or scotch Irish>

Sorry about the misspell but it should be no 'e' at the end. I am wondering if it is Scottish or Irish because my great-grandfather said that he recalled his father saying he had 'come over' from Ireland. They did not have a very good relationship and unfortunately none of us know much about him and where he came from (my great, great grandfather that is). Thanks again for any help.