For most of my life I thought that Grealis was an unusual surname found mostly in the West of Ireland in County Mayo. My great grandfather, Patrick Grealis,was one of five brothers and I recently began to input into a database the descendants of those five brothers. I have since come across many Grealis names on the Internet,in Ohio, New Jersey, Massachusetts, West Virginia and Ontario, Canada. Further research turned up a John Grealis, who enlisted in the Union Army from Nevada in 1860 and a Patrick Grealis found in the 1860 census of Albany, NY. This page is an attempt to bring all those diverse families together.