German: nickname for a ruffian, earlier for a hairy person,
from Middle High German ruch, ruhe, rouch
‘hairy’, ‘shaggy’, ‘rough’.
English: from a medieval
personal name, a variant of Ralph.
Italian
(Sicily): from a local variant of the personal name Rao, an old
form of Ra(o)ul, composed of the Germanic elements rad
‘counsel’, ‘advice’ + wolf ‘wolf’. Compare Ralph.
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The rau name in History
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