An Etymological Dictionary of the German Language/Annotated/Bücking

by Friedrich Kluge

Bücking, masculine, ‘bloater’ (also Bückling, based on Bückling, ‘bow,’ from biegen), from the equivalent Middle High German and Middle Low German bückinc; compare Dutch bokking, which is probably a derivative of Bock, Dutch bok, ‘hircus’; in fact, the fish is also called boxhorn (bockshorn) in Middle Dutch.