Anglicized spelling of Seán (pronounced ‘shawn’), Irish equivalent of John. The name has always been common in Ireland, but since the 1960s has frequently been chosen (usually without the accent) by parents who have no Irish connections. One influence on its popularity has been the actor Sean Connery (b. 1930), of James Bond fame.
English: from Middle English more ‘moor’, ‘marsh’, ‘fen’, ‘area of uncultivated land’ (Old English mōr), hence a topographic name for someone who lived in such a place or a habitational name from any of the various places named with this word, as for example Moore in Cheshire or More in Shropshire.