köken: Like obsolete Buhu, Schuhu, an alteration of early modern German Huhu, itself an onomatopoeic reduplication of *Hu, from Middle High German hūwe, huo, from Old High German hūwo (“nightowl”), from Proto-West Germanic *hūō (“owl”).
köken: An onomatopoeia, related to uhog, the dialectal variant of huhog. The German Uhu (“Eurasian eagle owl”) probably also contributed to its spread in zoological jargon and colloquial language. First attested in 1822.
From Byzantine Greek μποῦφος (mpoûphos, “eagle owl”), from Late Latin būfus (“owl”). Or further from Ancient Greek βοῦφος (boûphos, “eagle owl”). A borrowing is necessary because of the well-established bilabial spirantization, which is missing in the term. With the seldom occurrence of the Ancient Greek word, a derivation becomes less likely.