Grail Family History
Grail Surname Meaning
Perhaps from Old French graisle Anglo-Norman French gresle gredle graile greile greele ‘thin slim lean’.
Compare the synonymous Greasley (2) some forms of which may have been interchangeable with this name.
Reduced from Mag Réill see McGrail.
Source: The Concise Oxford Dictionary of Family Names in Britain, 2021
