Raine : 1: English: from the medieval female personal name Rayne (from Old French reine ‘queen’ Latin regina).2: English: from the Middle English personal name Ra(y)ne Reyne a pet form of Reynold and Rayner or possibly Ranulf (see Randolph).5: French and possibly also English: nickname from Old French raine ‘frog’ (from Latin rana).3: English: perhaps a habitational name from Rayne (Essex); see Raines.4: Scottish: habitational name from Rayne (Aberdeenshire) of unexplained etymology.
Source : DAFN2 : Dictionary of American Family Names 2nd edition, ©2022 by Patrick Hanks and Oxford University Press
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