An Cnoc

Knock occupies a civil parish spanning the baronies of Clanmorris and Costello in County Mayo. The placename derives from the Irish 'cnoc' (the hill), documented from at least 1307 in early records, with the name stabilizing to its modern form 'Knock' by the 17th century (appearing in documents from 1615 onward, including the Books of Survey and Distribution from 1661). The defining historical...