McGrail Family Genealogy Forum
McGrail and McGreal are alternate spellings of the same name. They are also pronounced the same. In Ireland (at least before and during the 19th Century)the spellings were interchangable. My gr. grandfather was born "McGreal" and died "McGrail".
The name derives from the Gaelic "Mag Reill" which is the Irish Gaelic form of the Scottish "MacNeill", the clan from which we all descend. The McGrails and McGreal are "septs" (or branches) of the Clan.
For more info, see http://McGrail.net