Invented by the Elizabethan pastoral poet Sir Philip Sidney (1554–86), in whose verse it is stressed on the second syllable. There is no clue to the sources that influenced Sidney in this coinage. It was later taken up by Samuel Richardson for the name of the heroine of his novel Pamela (1740). In Henry Fielding's Joseph Andrews (1742), which started out as a parody of Pamela, Fielding comments that the name is ‘very strange’.
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.