From Middle English wolf, from Old English wulf, ƿulf, from Proto-West Germanic *wulf, from Proto-Germanic *wulfaz (compare Saterland Frisian Wulf, West Frisian and Dutch wolf, German Wolf, Norwegian and Danish ulv), from Proto-Indo-European *wĺ̥kʷos (compare Sanskrit वृक, Persian گرگ, Lithuanian vilkas, Russian волк, Albanian ujk, Latin lupus, Greek λύκος, Tocharian B walkwe). lobo, and lupus.
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